upload failed -- "I/O operation on closed file" #1794

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opened 2012-07-17 12:57:00 +00:00 by zooko · 7 comments

zooko commented 2012-07-17 12:57:00 +00:00

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A call to tahoe backup on the command-line ended with this:

uploading './_darcs/patches/0000000452-203b744d7323110202fda6f42296ac24d699e79cfa82df294567276fda24c6ab'..                                                                                          [189/336]
 ./_darcs/patches/0000000452-203b744d7323110202fda6f42296ac24d699e79cfa82df294567276fda24c6ab -> URI:CHK:e2mh2nlllpjxqtihtadu2gdfuq:7274zdu36zq7m65svkkyp3eo3r65oeavmx6dbt7bsikoqwl3lpeq:1:1:332
uploading './_darcs/patches/0000000645-c5799a45bde6fb7b970e7a85b47121dbb72496f4e52ec927dadabb3e0c0ae46c'..
 ./_darcs/patches/0000000645-c5799a45bde6fb7b970e7a85b47121dbb72496f4e52ec927dadabb3e0c0ae46c -> URI:CHK:yzk4twdq36bmeslfb3us27l5zm:5rezjno7rdip2j7ics2w2zpwtylp4wsys55aymyrynplwzx7ztra:1:1:422
uploading './_darcs/patches/0000003657-20949c0699f1e7e939b33ec85764c2565e076988ff8cd51bdfba8b1f24133a15'..
Traceback (most recent call last):
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/runner.py", line 117, in run
    rc = runner(sys.argv[1:], install_node_control=install_node_control)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/runner.py", line 102, in runner
    rc = cli.dispatch[command](so)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/cli.py", line 569, in backup
    rc = tahoe_backup.backup(options)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 325, in backup
    return bu.run()
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 118, in run
    new_backup_dircap = self.process(options.from_dir)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 188, in process
    childcap = self.process(childpath)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 188, in process
    childcap = self.process(childpath)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 194, in process
    childcap, metadata = self.upload(childpath)
  File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 305, in upload
    raise HTTPError("Error during file PUT", resp)
HTTPError: Error during file PUT: 500 Internal Server Error
"Traceback (most recent call last):\x0a  File \"/home/zooko/playground/tahoe-lafs/dw/src/allmydata/util/pipeline.py\", line 65, in _ebDeferred\x0a    self.checkForFinished()\x0a  File \"/home/zooko/playground/tahoe-lafs/dw/src/allmydata/util/pipeline.py\", line 53, in checkForFinished\x0a    self.errback(self.failure)\x0a  File \"/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py\", line 391, in errback\x0a    self._startRunCallbacks(fail)\x0a  File \"/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py\", line 458, in _startRunCallbacks\x0a    self._runCallbacks()\x0a--- <exception caught here> ---\x0a  File \"/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py\", line 545, in _runCallbacks\x0a    current.result = callback(current.result, *args, **kw)\x0a  File \"/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/encode.py\", line 501, in _remove_shareholder\x0a    raise UploadUnhappinessError(msg)\x0aallmydata.interfaces.UploadUnhappinessError: shares could be placed or found on only 0 server(s). We were asked to place shares on at least 1 server(s) such that any 1 of them have enough shares to recover the file.: [Failure instance: Traceback (failure with no frames): <class 'allmydata.util.pipeline.PipelineError'>: <PipelineError error=([Failure instance: Traceback (failure with no frames): <class 'foolscap.ipb.DeadReferenceError'>: Connection was lost (to tubid=66ra) (during method=RIBucketWriter:write)\x0a])>\x0a]\x0a"

The twistd.log file had:

2012-07-17 08:09:46-0300 [-] 'Original exception:'
2012-07-17 08:09:46-0300 [-] Unhandled Error
        Traceback (most recent call last):
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 287, in addCallbacks
            self._runCallbacks()
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 545, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/upload.py", line 752, in <lambda>
            self._read_encrypted(length, ciphertext, hash_only, d2))
          File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/upload.py", line 767, in _read_encrypted
            d = defer.maybeDeferred(self.original.read, size)
        --- <exception caught here> ---
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 134, in maybeDeferred
            result = f(*args, **kw)
          File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/upload.py", line 1467, in read
            return defer.succeed([self._filehandle.read(length)])
        exceptions.ValueError: I/O operation on closed file
        
2012-07-17 08:09:46-0300 [-] Unhandled error in Deferred:
2012-07-17 08:09:46-0300 [-] Unhandled Error
        Traceback (most recent call last):
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/base.py", line 800, in runUntilCurrent
            call.func(*call.args, **call.kw)
          File "/usr/local/lib/python2.7/dist-packages/foolscap-0.6.3.post0-py2.7.egg/foolscap/eventual.py", line 26, in _turn
            cb(*args, **kwargs)
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 362, in callback
            self._startRunCallbacks(result)
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 458, in _startRunCallbacks
            self._runCallbacks()
        --- <exception caught here> ---
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 545, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg/nevow/appserver.py", line 91, in processingFailed
            request.finishRequest( False )
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg/nevow/appserver.py", line 176, in finishRequest
            server.Request.finish(self)
          File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/web/http.py", line 866, in finish
            "Request.finish called on a request after its connection was lost; "
        exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
        

The versions are:

$ tahoe --version-and-path
allmydata-tahoe: 1.9.0-r5601 (/home/zooko/playground/tahoe-lafs/dw/src)
foolscap: 0.6.3.post0 (/usr/local/lib/python2.7/dist-packages/foolscap-0.6.3.post0-py2.7.egg)
pycryptopp: 0.6.0.1206569328141510525648634803928199668821045408958 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/pycryptopp-0.6.0.1206569328141510525648634803928199668821045408958-py2.7-linux-x86_64.egg)
zfec: 1.4.24 (/usr/local/lib/python2.7/dist-packages/zfec-1.4.24-py2.7-linux-x86_64.egg)
Twisted: 11.1.0 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg)
Nevow: 0.10.0 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg)
zope.interface: unknown (/usr/local/lib/python2.7/dist-packages/zope.interface-3.6.1-py2.7-linux-x86_64.egg/zope)
python: 2.7.3 (/usr/bin/python)
platform: Linux-Ubuntu_12.04-x86_64-64bit_ELF (None)
pyOpenSSL: 0.12 (/usr/lib/python2.7/dist-packages)
simplejson: 2.3.2 (/usr/lib/python2.7/dist-packages)
pycrypto: 2.5 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/pycrypto-2.5-py2.7-linux-x86_64.egg)
pyasn1: unknown (/usr/lib/python2.7/dist-packages)
mock: 0.8.0beta3 (/usr/local/lib/python2.7/dist-packages)
setuptools: 0.6c16dev3 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/setuptools-0.6c16dev3.egg)

A call to `tahoe backup` on the command-line ended with this: ``` uploading './_darcs/patches/0000000452-203b744d7323110202fda6f42296ac24d699e79cfa82df294567276fda24c6ab'.. [189/336] ./_darcs/patches/0000000452-203b744d7323110202fda6f42296ac24d699e79cfa82df294567276fda24c6ab -> URI:CHK:e2mh2nlllpjxqtihtadu2gdfuq:7274zdu36zq7m65svkkyp3eo3r65oeavmx6dbt7bsikoqwl3lpeq:1:1:332 uploading './_darcs/patches/0000000645-c5799a45bde6fb7b970e7a85b47121dbb72496f4e52ec927dadabb3e0c0ae46c'.. ./_darcs/patches/0000000645-c5799a45bde6fb7b970e7a85b47121dbb72496f4e52ec927dadabb3e0c0ae46c -> URI:CHK:yzk4twdq36bmeslfb3us27l5zm:5rezjno7rdip2j7ics2w2zpwtylp4wsys55aymyrynplwzx7ztra:1:1:422 uploading './_darcs/patches/0000003657-20949c0699f1e7e939b33ec85764c2565e076988ff8cd51bdfba8b1f24133a15'.. Traceback (most recent call last): File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/runner.py", line 117, in run rc = runner(sys.argv[1:], install_node_control=install_node_control) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/runner.py", line 102, in runner rc = cli.dispatch[command](so) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/cli.py", line 569, in backup rc = tahoe_backup.backup(options) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 325, in backup return bu.run() File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 118, in run new_backup_dircap = self.process(options.from_dir) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 188, in process childcap = self.process(childpath) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 188, in process childcap = self.process(childpath) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 194, in process childcap, metadata = self.upload(childpath) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/scripts/tahoe_backup.py", line 305, in upload raise HTTPError("Error during file PUT", resp) HTTPError: Error during file PUT: 500 Internal Server Error "Traceback (most recent call last):\x0a File \"/home/zooko/playground/tahoe-lafs/dw/src/allmydata/util/pipeline.py\", line 65, in _ebDeferred\x0a self.checkForFinished()\x0a File \"/home/zooko/playground/tahoe-lafs/dw/src/allmydata/util/pipeline.py\", line 53, in checkForFinished\x0a self.errback(self.failure)\x0a File \"/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py\", line 391, in errback\x0a self._startRunCallbacks(fail)\x0a File \"/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py\", line 458, in _startRunCallbacks\x0a self._runCallbacks()\x0a--- <exception caught here> ---\x0a File \"/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py\", line 545, in _runCallbacks\x0a current.result = callback(current.result, *args, **kw)\x0a File \"/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/encode.py\", line 501, in _remove_shareholder\x0a raise UploadUnhappinessError(msg)\x0aallmydata.interfaces.UploadUnhappinessError: shares could be placed or found on only 0 server(s). We were asked to place shares on at least 1 server(s) such that any 1 of them have enough shares to recover the file.: [Failure instance: Traceback (failure with no frames): <class 'allmydata.util.pipeline.PipelineError'>: <PipelineError error=([Failure instance: Traceback (failure with no frames): <class 'foolscap.ipb.DeadReferenceError'>: Connection was lost (to tubid=66ra) (during method=RIBucketWriter:write)\x0a])>\x0a]\x0a" ``` The `twistd.log` file had: ``` 2012-07-17 08:09:46-0300 [-] 'Original exception:' 2012-07-17 08:09:46-0300 [-] Unhandled Error Traceback (most recent call last): File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 287, in addCallbacks self._runCallbacks() File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 545, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/upload.py", line 752, in <lambda> self._read_encrypted(length, ciphertext, hash_only, d2)) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/upload.py", line 767, in _read_encrypted d = defer.maybeDeferred(self.original.read, size) --- <exception caught here> --- File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 134, in maybeDeferred result = f(*args, **kw) File "/home/zooko/playground/tahoe-lafs/dw/src/allmydata/immutable/upload.py", line 1467, in read return defer.succeed([self._filehandle.read(length)]) exceptions.ValueError: I/O operation on closed file 2012-07-17 08:09:46-0300 [-] Unhandled error in Deferred: 2012-07-17 08:09:46-0300 [-] Unhandled Error Traceback (most recent call last): File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/base.py", line 800, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/local/lib/python2.7/dist-packages/foolscap-0.6.3.post0-py2.7.egg/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 362, in callback self._startRunCallbacks(result) File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 458, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/internet/defer.py", line 545, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg/nevow/appserver.py", line 91, in processingFailed request.finishRequest( False ) File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg/twisted/web/http.py", line 866, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. ``` The versions are: ``` $ tahoe --version-and-path allmydata-tahoe: 1.9.0-r5601 (/home/zooko/playground/tahoe-lafs/dw/src) foolscap: 0.6.3.post0 (/usr/local/lib/python2.7/dist-packages/foolscap-0.6.3.post0-py2.7.egg) pycryptopp: 0.6.0.1206569328141510525648634803928199668821045408958 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/pycryptopp-0.6.0.1206569328141510525648634803928199668821045408958-py2.7-linux-x86_64.egg) zfec: 1.4.24 (/usr/local/lib/python2.7/dist-packages/zfec-1.4.24-py2.7-linux-x86_64.egg) Twisted: 11.1.0 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Twisted-11.1.0-py2.7-linux-x86_64.egg) Nevow: 0.10.0 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/Nevow-0.10.0-py2.7.egg) zope.interface: unknown (/usr/local/lib/python2.7/dist-packages/zope.interface-3.6.1-py2.7-linux-x86_64.egg/zope) python: 2.7.3 (/usr/bin/python) platform: Linux-Ubuntu_12.04-x86_64-64bit_ELF (None) pyOpenSSL: 0.12 (/usr/lib/python2.7/dist-packages) simplejson: 2.3.2 (/usr/lib/python2.7/dist-packages) pycrypto: 2.5 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/pycrypto-2.5-py2.7-linux-x86_64.egg) pyasn1: unknown (/usr/lib/python2.7/dist-packages) mock: 0.8.0beta3 (/usr/local/lib/python2.7/dist-packages) setuptools: 0.6c16dev3 (/home/zooko/playground/tahoe-lafs/dw/support/lib/python2.7/site-packages/setuptools-0.6c16dev3.egg) ```

zooko added the

c/code-network

p/normal

t/defect

v/1.9.2

labels 2012-07-17 12:57:00 +00:00

zooko added this to the undecided milestone 2012-07-17 12:57:00 +00:00

zooko commented 2012-07-17 13:51:24 +00:00

Author

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I did a darcs pull and got only a few minor patches, so the version that exhibited this error is almost identical to 1.9.2 release:

Pulling from "zooko@tahoe-lafs.org:/home/source/darcs/tahoe-lafs/trunk"...
Sun Jul  1 20:19:21 ADT 2012  david-sarah@jacaranda.org
  * Relnotes, NEWS and quickstart updates for 1.9.2, with updated release date. refs #1776
Shall I pull this patch? (1/4)  [ynW...], or ? for more options: y
Tue Jul  3 11:45:22 ADT 2012  david-sarah@jacaranda.org
  * Slightly improve the error message when a stats.pickle file cannot be read.
Shall I pull this patch? (2/4)  [ynW...], or ? for more options: y
Tue Jul  3 13:30:10 ADT 2012  david-sarah@jacaranda.org
  * Update release date for 1.9.2.
Shall I pull this patch? (3/4)  [ynW...], or ? for more options: y
Thu Jul 12 17:30:26 ADT 2012  david-sarah@jacaranda.org
  * docs/configuration.rst: clarify statement about lack of redundancy when shares.happy <= k. fixes #1793
Shall I pull this patch? (4/4)  [ynW...], or ? for more options: y

$ ./bin/tahoe  --version
allmydata-tahoe: 1.9.0-r5609
foolscap: 0.6.3.post0
pycryptopp: 0.6.0.1206569328141510525648634803928199668821045408958
zfec: 1.4.24
Twisted: 11.1.0
Nevow: 0.10.0
zope.interface: unknown
python: 2.7.3
platform: Linux-Ubuntu_12.04-x86_64-64bit_ELF
pyOpenSSL: 0.12
simplejson: 2.3.2
pycrypto: 2.5
pyasn1: unknown
mock: 0.8.0beta3
setuptools: 0.6c16dev3

I did a darcs pull and got only a few minor patches, so the version that exhibited this error is almost identical to 1.9.2 release: ``` Pulling from "zooko@tahoe-lafs.org:/home/source/darcs/tahoe-lafs/trunk"... Sun Jul 1 20:19:21 ADT 2012 david-sarah@jacaranda.org * Relnotes, NEWS and quickstart updates for 1.9.2, with updated release date. refs #1776 Shall I pull this patch? (1/4) [ynW...], or ? for more options: y Tue Jul 3 11:45:22 ADT 2012 david-sarah@jacaranda.org * Slightly improve the error message when a stats.pickle file cannot be read. Shall I pull this patch? (2/4) [ynW...], or ? for more options: y Tue Jul 3 13:30:10 ADT 2012 david-sarah@jacaranda.org * Update release date for 1.9.2. Shall I pull this patch? (3/4) [ynW...], or ? for more options: y Thu Jul 12 17:30:26 ADT 2012 david-sarah@jacaranda.org * docs/configuration.rst: clarify statement about lack of redundancy when shares.happy <= k. fixes #1793 Shall I pull this patch? (4/4) [ynW...], or ? for more options: y ``` ``` $ ./bin/tahoe --version allmydata-tahoe: 1.9.0-r5609 foolscap: 0.6.3.post0 pycryptopp: 0.6.0.1206569328141510525648634803928199668821045408958 zfec: 1.4.24 Twisted: 11.1.0 Nevow: 0.10.0 zope.interface: unknown python: 2.7.3 platform: Linux-Ubuntu_12.04-x86_64-64bit_ELF pyOpenSSL: 0.12 simplejson: 2.3.2 pycrypto: 2.5 pyasn1: unknown mock: 0.8.0beta3 setuptools: 0.6c16dev3 ```

zooko commented 2014-11-28 16:01:57 +00:00

Author

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My consulting client (codename "WAG", see comment:382539) has this symptom as well. This is from their storage node's twistd.log:

2014-10-16 19:37:01+0530 [-] Unhandled Error
        Traceback (most recent call last):
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 380, i
n callback
            self._startRunCallbacks(result)
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 488, i
n _startRunCallbacks
            self._runCallbacks()
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 575, i
n _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Nevow-0.11.1-py2.6.egg/nevow/appserver.py", line 163, in gotPageContext
            pageContext.tag.renderHTTP, pageContext
        --- <exception caught here> ---
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 137, i
n maybeDeferred
            result = f(*args, **kw)
          File "/data/allmydata-tahoe-1.10.0/src/allmydata/web/common.py", line 352, in renderHTTP
            return m(ctx)
          File "/data/allmydata-tahoe-1.10.0/src/allmydata/web/filenode.py", line 109, in render_PUT
            return self.replace_me_with_a_child(req, self.client, replace)
          File "/data/allmydata-tahoe-1.10.0/src/allmydata/web/filenode.py", line 32, in replace_me_with_a_child
            data = MutableFileHandle(req.content)
          File "/data/allmydata-tahoe-1.10.0/src/allmydata/mutable/publish.py", line 1219, in __init__
            self._filehandle.seek(0)
        exceptions.ValueError: I/O operation on closed file.
        

I think that this is caused by file descriptor resource exhaustion, because I've seen this in that twistd.log:

2014-11-20 13:33:36+0530 [HTTPChannel,143180,192.168.51.230] Unhandled Error
        Traceback (most recent call last):
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/log.py", line 88, in cal
lWithLogger
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/log.py", line 73, in cal
lWithContext
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/context.py", line 118, i
n callWithContext
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/context.py", line 81, in
 callWithContext
            
        --- <exception caught here> ---
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/posixbase.py", line 61
4, in _doReadOrWrite
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/tcp.py", line 215, in 
doRead
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/tcp.py", line 221, in 
_dataReceived
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/protocols/basic.py", line 581, 
in dataReceived
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/web/http.py", line 1609, in lin
eReceived
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/web/http.py", line 1702, in all
HeadersReceived
            
          File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/web/http.py", line 694, in gotL
ength
            
          File "/usr/lib64/python2.6/tempfile.py", line 475, in TemporaryFile
            
          File "/usr/lib64/python2.6/tempfile.py", line 228, in _mkstemp_inner
            
        exceptions.OSError: [Errno 24] Too many open files: '/GFS2_tahoe/.tahoe-filestore1/tmp/tmpmKDgf6'

My consulting client (codename "WAG", see [comment:382539](/tahoe-lafs/trac/issues/1278#issuecomment-382539)) has this symptom as well. This is from their storage node's twistd.log: ``` 2014-10-16 19:37:01+0530 [-] Unhandled Error Traceback (most recent call last): File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 380, i n callback self._startRunCallbacks(result) File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 488, i n _startRunCallbacks self._runCallbacks() File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 575, i n _runCallbacks current.result = callback(current.result, *args, **kw) File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Nevow-0.11.1-py2.6.egg/nevow/appserver.py", line 163, in gotPageContext pageContext.tag.renderHTTP, pageContext --- <exception caught here> --- File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/defer.py", line 137, i n maybeDeferred result = f(*args, **kw) File "/data/allmydata-tahoe-1.10.0/src/allmydata/web/common.py", line 352, in renderHTTP return m(ctx) File "/data/allmydata-tahoe-1.10.0/src/allmydata/web/filenode.py", line 109, in render_PUT return self.replace_me_with_a_child(req, self.client, replace) File "/data/allmydata-tahoe-1.10.0/src/allmydata/web/filenode.py", line 32, in replace_me_with_a_child data = MutableFileHandle(req.content) File "/data/allmydata-tahoe-1.10.0/src/allmydata/mutable/publish.py", line 1219, in __init__ self._filehandle.seek(0) exceptions.ValueError: I/O operation on closed file. ``` I think that this is caused by file descriptor resource exhaustion, because I've seen this in that twistd.log: ``` 2014-11-20 13:33:36+0530 [HTTPChannel,143180,192.168.51.230] Unhandled Error Traceback (most recent call last): File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/log.py", line 88, in cal lWithLogger File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/log.py", line 73, in cal lWithContext File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/context.py", line 118, i n callWithContext File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/python/context.py", line 81, in callWithContext --- <exception caught here> --- File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/posixbase.py", line 61 4, in _doReadOrWrite File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/tcp.py", line 215, in doRead File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/internet/tcp.py", line 221, in _dataReceived File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/protocols/basic.py", line 581, in dataReceived File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/web/http.py", line 1609, in lin eReceived File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/web/http.py", line 1702, in all HeadersReceived File "/data/allmydata-tahoe-1.10.0/support/lib/python2.6/site-packages/Twisted-13.0.0-py2.6-linux-x86_64.egg/twisted/web/http.py", line 694, in gotL ength File "/usr/lib64/python2.6/tempfile.py", line 475, in TemporaryFile File "/usr/lib64/python2.6/tempfile.py", line 228, in _mkstemp_inner exceptions.OSError: [Errno 24] Too many open files: '/GFS2_tahoe/.tahoe-filestore1/tmp/tmpmKDgf6' ```

zooko commented 2014-12-18 23:43:32 +00:00

Author

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A customer (now former customer) of LeastAuthority's S4 service, named AB, reported a problem, and his twistd.log contains this:

2014-11-08 17:46:18+0000 [SSHService ssh-connection on SSHServerTransport,1,127.0.0.1] adding 81920 to 49152 in channel 0
2014-11-08 17:46:18+0000 [SSHService ssh-connection on SSHServerTransport,1,127.0.0.1] adding 81920 to 49152 in channel 0
2014-11-08 17:46:18+0000 [SSHService ssh-connection on SSHServerTransport,1,127.0.0.1] adding 81920 to 49152 in channel 0
2014-11-08 17:46:37+0000 [-] Unhandled error in Deferred:
2014-11-08 17:46:37+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 42, in cb
	    _drive(iterable, finished)
	  File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 26, in _drive
	    finished.callback('')
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
	    self._startRunCallbacks(result)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 181, in _cbFinishRender
	    self.finishRequest(  True )
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
	
2014-11-08 17:50:08+0000 [SSHServerTransport,1,127.0.0.1] Got remote error, code 11
	reason: disconnected by user
2014-11-08 17:50:08+0000 [SSHServerTransport,1,127.0.0.1] connection lost
2014-11-08 17:52:10+0000 [-] Log opened.
2014-11-08 17:52:10+0000 [-] twistd 14.0.0 (/usr/bin/python2.7 2.7.8) starting up.
2014-11-08 17:52:10+0000 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2014-11-08 17:52:10+0000 [-] Listener starting on 51077
2014-11-08 17:52:10+0000 [-] SSHFactory starting on 8022
2014-11-08 17:52:10+0000 [-] Starting factory <allmydata.frontends.sftpd.SSHFactory instance at 0x7f9451502e18>
2014-11-08 17:52:10+0000 [-] NevowSite starting on 3456
2014-11-08 17:52:10+0000 [-] Starting factory <nevow.appserver.NevowSite instance at 0x7f94510b4488>
2014-11-08 17:52:10+0000 [-] My pid: 16255
2014-11-08 17:52:10+0000 [-] DatagramProtocol starting on 47997
2014-11-08 17:52:10+0000 [-] Starting protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f9450c6ddd0>
2014-11-08 17:52:10+0000 [-] (UDP Port 47997 Closed)
2014-11-08 17:52:10+0000 [-] Stopping protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f9450c6ddd0>
2014-11-08 17:53:30+0000 [-] Exception rendering error page:
2014-11-08 17:53:30+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
	    cb(*args, **kwargs)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
	    self._startRunCallbacks(result)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed
	    handler.renderHTTP_exception(ctx, reason)
	  File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception
	    return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR)
	  File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple
	    req.finishRequest(False)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
	
2014-11-08 17:53:30+0000 [-] 'Original exception:'
2014-11-08 17:53:30+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks
	    self._runCallbacks()
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda>
	    self._read_encrypted(length, ciphertext, hash_only, d2))
	  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted
	    d = defer.maybeDeferred(self.original.read, size)
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred
	    result = f(*args, **kw)
	  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read
	    return defer.succeed([self._filehandle.read(length)])
	exceptions.ValueError: I/O operation on closed file
	
2014-11-08 17:53:30+0000 [-] Unhandled error in Deferred:
2014-11-08 17:53:30+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent
	    call.func(*call.args, **call.kw)
	  File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
	    cb(*args, **kwargs)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
	    self._startRunCallbacks(result)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed
	    request.finishRequest( False )
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
	
2014-11-08 17:53:57+0000 [-] Unhandled error in Deferred:
2014-11-08 17:53:57+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 169, in gotPageContext
	    self._cbFinishRender, pageContext
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 306, in addCallback
	    callbackKeywords=kw)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks
	    self._runCallbacks()
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 181, in _cbFinishRender
	    self.finishRequest(  True )
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
	
2014-11-08 17:54:28+0000 [-] Unhandled error in Deferred:
2014-11-08 17:54:28+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 42, in cb
	    _drive(iterable, finished)
	  File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 26, in _drive
	    finished.callback('')
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
	    self._startRunCallbacks(result)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 181, in _cbFinishRender
	    self.finishRequest(  True )
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.

(plus much more of the same)

A customer (now former customer) of LeastAuthority's S4 service, named AB, reported a problem, and his `twistd.log` contains this: ``` 2014-11-08 17:46:18+0000 [SSHService ssh-connection on SSHServerTransport,1,127.0.0.1] adding 81920 to 49152 in channel 0 2014-11-08 17:46:18+0000 [SSHService ssh-connection on SSHServerTransport,1,127.0.0.1] adding 81920 to 49152 in channel 0 2014-11-08 17:46:18+0000 [SSHService ssh-connection on SSHServerTransport,1,127.0.0.1] adding 81920 to 49152 in channel 0 2014-11-08 17:46:37+0000 [-] Unhandled error in Deferred: 2014-11-08 17:46:37+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 42, in cb _drive(iterable, finished) File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 26, in _drive finished.callback('') File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 181, in _cbFinishRender self.finishRequest( True ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. 2014-11-08 17:50:08+0000 [SSHServerTransport,1,127.0.0.1] Got remote error, code 11 reason: disconnected by user 2014-11-08 17:50:08+0000 [SSHServerTransport,1,127.0.0.1] connection lost 2014-11-08 17:52:10+0000 [-] Log opened. 2014-11-08 17:52:10+0000 [-] twistd 14.0.0 (/usr/bin/python2.7 2.7.8) starting up. 2014-11-08 17:52:10+0000 [-] reactor class: twisted.internet.epollreactor.EPollReactor. 2014-11-08 17:52:10+0000 [-] Listener starting on 51077 2014-11-08 17:52:10+0000 [-] SSHFactory starting on 8022 2014-11-08 17:52:10+0000 [-] Starting factory <allmydata.frontends.sftpd.SSHFactory instance at 0x7f9451502e18> 2014-11-08 17:52:10+0000 [-] NevowSite starting on 3456 2014-11-08 17:52:10+0000 [-] Starting factory <nevow.appserver.NevowSite instance at 0x7f94510b4488> 2014-11-08 17:52:10+0000 [-] My pid: 16255 2014-11-08 17:52:10+0000 [-] DatagramProtocol starting on 47997 2014-11-08 17:52:10+0000 [-] Starting protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f9450c6ddd0> 2014-11-08 17:52:10+0000 [-] (UDP Port 47997 Closed) 2014-11-08 17:52:10+0000 [-] Stopping protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f9450c6ddd0> 2014-11-08 17:53:30+0000 [-] Exception rendering error page: 2014-11-08 17:53:30+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed handler.renderHTTP_exception(ctx, reason) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple req.finishRequest(False) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. 2014-11-08 17:53:30+0000 [-] 'Original exception:' 2014-11-08 17:53:30+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda> self._read_encrypted(length, ciphertext, hash_only, d2)) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted d = defer.maybeDeferred(self.original.read, size) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred result = f(*args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read return defer.succeed([self._filehandle.read(length)]) exceptions.ValueError: I/O operation on closed file 2014-11-08 17:53:30+0000 [-] Unhandled error in Deferred: 2014-11-08 17:53:30+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed request.finishRequest( False ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. 2014-11-08 17:53:57+0000 [-] Unhandled error in Deferred: 2014-11-08 17:53:57+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 169, in gotPageContext self._cbFinishRender, pageContext File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 306, in addCallback callbackKeywords=kw) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 181, in _cbFinishRender self.finishRequest( True ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. 2014-11-08 17:54:28+0000 [-] Unhandled error in Deferred: 2014-11-08 17:54:28+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 42, in cb _drive(iterable, finished) File "/usr/lib64/python2.7/site-packages/nevow/flat/twist.py", line 26, in _drive finished.callback('') File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 181, in _cbFinishRender self.finishRequest( True ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. ``` (plus much more of the same)

zooko commented 2014-12-19 01:27:14 +00:00

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Erstwhile customer AB reports this result from lsof:

COMMAND   PID USER   FD      TYPE  DEVICE  SIZE/OFF     NODE NAME
tahoe   17548 root  cwd       DIR    0,17       196  7835586 /root/.tahoe
tahoe   17548 root  rtd       DIR    0,17       792      256 /
tahoe   17548 root  txt       REG    0,17      6160  7145804 /usr/bin/python2.7
tahoe   17548 root  mem       REG    0,15            7145804 /usr/bin/python2.7 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2324166 /usr/lib64/libexpat.so.1.6.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145964 /usr/lib64/python2.7/lib-dynload/pyexpat.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            5586190 /lib64/libnss_ldap-2.19.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100932 /lib64/libnss_dns-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9514490 /usr/lib64/libgpg-error.so.0.13.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180104 /usr/lib64/samba/libflag_mapping.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9253323 /usr/lib64/libhogweed.so.2.5 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9253322 /usr/lib64/libnettle.so.4.7 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            3318025 /usr/lib64/libtasn1.so.6.3.2 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433815 /usr/lib64/libheimntlm.so.0.1.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100703 /lib64/libcrypt-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1434113 /usr/lib64/libroken.so.18.1.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433812 /usr/lib64/libhcrypto.so.4.1.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9250241 /usr/lib64/libsqlite3.so.0.8.6 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1434239 /usr/lib64/libwind.so.0.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433822 /usr/lib64/libhx509.so.5.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433814 /usr/lib64/libheimbase.so.1.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            3341999 /usr/lib64/libgcrypt.so.20.0.2 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180112 /usr/lib64/samba/libauth_sam_reply.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180092 /usr/lib64/libndr-krb5pac.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180113 /usr/lib64/samba/libldbsamba.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180106 /usr/lib64/samba/libsamdb-common.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180120 /usr/lib64/libsamdb.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180091 /usr/lib64/samba/libndr-samba.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180119 /usr/lib64/samba/libsamba-modules.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180111 /usr/lib64/samba/libcliauth.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433478 /usr/lib64/libasn1.so.8.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9823998 /usr/lib64/libldb.so.1.1.18 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180098 /usr/lib64/samba/libasn1util.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180107 /usr/lib64/samba/libcli-ldap-common.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9571157 /usr/lib64/libgnutls.so.28.41.2 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            3386138 /usr/lib64/libsasl2.so.3.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100934 /lib64/libresolv-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            3093872 /lib64/libattr.so.1.1.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180096 /usr/lib64/libndr-nbt.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9637656 /usr/lib64/libntdb.so.1.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180108 /usr/lib64/samba/libutil_ntdb.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            3378309 /lib64/libcom_err.so.2.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433737 /usr/lib64/libgssapi.so.3.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            1433897 /usr/lib64/libkrb5.so.26.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180094 /usr/lib64/samba/libcli-nbt.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180115 /usr/lib64/samba/libauthkrb5.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180103 /usr/lib64/libsamba-credentials.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180117 /usr/lib64/libgensec.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180186 /usr/lib64/samba/libsecrets3.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180109 /usr/lib64/samba/libkrb5samba.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180128 /usr/lib64/samba/libcli_cldap.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180083 /usr/lib64/samba/libaddns.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            6249370 /usr/lib64/libldap-2.4.so.2.10.3 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9629470 /usr/lib64/libtdb.so.1.3.3 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            6249372 /usr/lib64/liblber-2.4.so.2.10.3 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            3154798 /lib64/libcap.so.2.22 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9101141 /lib64/libnsl-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180101 /usr/lib64/libndr-standard.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180084 /usr/lib64/samba/libserver-role.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180090 /usr/lib64/libsamba-hostconfig.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180118 /usr/lib64/samba/libsmb_transport.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180085 /usr/lib64/samba/libtdb-wrap.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180082 /usr/lib64/samba/libutil_setid.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180199 /usr/lib64/samba/libsmbd_shim.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180095 /usr/lib64/samba/libsamba-security.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180099 /usr/lib64/samba/libsamba-sockets.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180194 /usr/lib64/samba/libutil_reg.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180197 /usr/lib64/samba/libsamba3-util.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180116 /usr/lib64/samba/libcli_smb_common.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180087 /usr/lib64/libndr.so.0.0.2 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180114 /usr/lib64/samba/libutil_tdb.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180080 /usr/lib64/samba/liberrors.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180192 /usr/lib64/samba/libCHARSET3.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180110 /usr/lib64/samba/libdbwrap.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180079 /usr/lib64/samba/libccan.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180097 /usr/lib64/libtevent-util.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180078 /usr/lib64/samba/libinterfaces.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180193 /usr/lib64/samba/libsmbregistry.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9621400 /usr/lib64/libtevent.so.0.9.22 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100737 /lib64/librt-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9584083 /usr/lib64/libtalloc.so.2.1.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180271 /usr/lib64/samba/libgse.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180191 /usr/lib64/libsmbconf.so.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180077 /usr/lib64/samba/libreplace.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180081 /usr/lib64/libsamba-util.so.0.0.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10180313 /usr/lib64/libnss_wins.so.2 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100990 /lib64/libnss_files-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9454529 /usr/lib64/python2.7/site-packages/Crypto/Util/_counter.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2409990 /usr/lib64/libgmp.so.10.2.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9454528 /usr/lib64/python2.7/site-packages/Crypto/PublicKey/_fastmath.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9454518 /usr/lib64/python2.7/site-packages/Crypto/Cipher/_AES.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145956 /usr/lib64/python2.7/lib-dynload/resource.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145940 /usr/lib64/python2.7/lib-dynload/syslog.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2321727 /lib64/libbz2.so.1.0.6 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145963 /usr/lib64/python2.7/lib-dynload/bz2.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145872 /usr/lib64/python2.7/lib-dynload/_bisect.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9484347 /usr/lib64/python2.7/site-packages/simplejson/_speedups.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145816 /usr/lib64/python2.7/lib-dynload/array.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            6895662 /usr/lib64/python2.7/site-packages/zfec/_fec.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            6894822 /usr/lib64/python2.7/site-packages/pycryptopp/publickey/ed25519/_ed25519.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            4650844 /usr/lib64/gcc/x86_64-pc-linux-gnu/4.8.3/libgcc_s.so.1 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            4651118 /usr/lib64/gcc/x86_64-pc-linux-gnu/4.8.3/libstdc++.so.6.0.19 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            6892940 /usr/lib64/libcrypto++.so.0.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            6894823 /usr/lib64/python2.7/site-packages/pycryptopp/_pycryptopp.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145937 /usr/lib64/python2.7/lib-dynload/cPickle.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145942 /usr/lib64/python2.7/lib-dynload/_csv.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145925 /usr/lib64/python2.7/lib-dynload/_json.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145928 /usr/lib64/python2.7/lib-dynload/unicodedata.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145952 /usr/lib64/python2.7/lib-dynload/termios.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2859901 /usr/lib64/python2.7/site-packages/cryptography/_Cryptography_cffi_36a40ff0x2bad1bae.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9454526 /usr/lib64/python2.7/site-packages/Crypto/Cipher/_DES3.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9552920 /usr/lib64/python2.7/site-packages/_cffi_backend.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2344194 /usr/lib64/libffi.so.6.0.2 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145976 /usr/lib64/python2.7/lib-dynload/_ctypes.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9465422 /usr/lib64/python2.7/site-packages/zope/interface/_zope_interface_coptimizations.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145936 /usr/lib64/python2.7/lib-dynload/select.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145932 /usr/lib64/python2.7/lib-dynload/parser.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145931 /usr/lib64/python2.7/lib-dynload/fcntl.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145934 /usr/lib64/python2.7/lib-dynload/_locale.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2756485 /usr/lib64/libssl.so.1.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145945 /usr/lib64/python2.7/lib-dynload/_ssl.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145947 /usr/lib64/python2.7/lib-dynload/_socket.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145845 /usr/lib64/python2.7/lib-dynload/_random.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2756484 /usr/lib64/libcrypto.so.1.0.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145946 /usr/lib64/python2.7/lib-dynload/_hashlib.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145835 /usr/lib64/python2.7/lib-dynload/math.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145840 /usr/lib64/python2.7/lib-dynload/datetime.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145926 /usr/lib64/python2.7/lib-dynload/_functools.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145959 /usr/lib64/python2.7/lib-dynload/zlib.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145832 /usr/lib64/python2.7/lib-dynload/strop.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145938 /usr/lib64/python2.7/lib-dynload/cStringIO.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            2658860 /lib64/libz.so.1.2.8 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145962 /usr/lib64/python2.7/lib-dynload/binascii.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145933 /usr/lib64/python2.7/lib-dynload/grp.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145870 /usr/lib64/python2.7/lib-dynload/_heapq.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145838 /usr/lib64/python2.7/lib-dynload/itertools.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145883 /usr/lib64/python2.7/lib-dynload/operator.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145863 /usr/lib64/python2.7/lib-dynload/_collections.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145811 /usr/lib64/python2.7/lib-dynload/_struct.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145833 /usr/lib64/python2.7/lib-dynload/time.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7145884 /usr/lib64/python2.7/lib-dynload/_io.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9103048 /usr/lib64/locale/locale-archive (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100632 /lib64/libm-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9101238 /lib64/libutil-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9100630 /lib64/libdl-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9101312 /lib64/libc-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9102815 /lib64/libpthread-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            7141028 /usr/lib64/libpython2.7.so.1.0 (path dev=0,17)
tahoe   17548 root  mem       REG    0,15            9101310 /lib64/ld-2.20.so (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10179068 /usr/share/samba/codepages/lowcase.dat (path dev=0,17)
tahoe   17548 root  mem       REG    0,15           10179069 /usr/share/samba/codepages/upcase.dat (path dev=0,17)
tahoe   17548 root    0u      CHR     1,3       0t0        8 /dev/null
tahoe   17548 root    1u      CHR     1,3       0t0        8 /dev/null
tahoe   17548 root    2u      CHR     1,3       0t0        8 /dev/null
tahoe   17548 root    3u      REG    0,17     47363  8357894 /root/.tahoe/logs/twistd.log
tahoe   17548 root    4r      CHR     1,9       0t0       13 /dev/urandom
tahoe   17548 root    5r     FIFO     0,7       0t0  1009081 pipe
tahoe   17548 root    6r     FIFO     0,7       0t0  1008144 pipe
tahoe   17548 root    7u     IPv4 1009082       0t0      TCP *:51077 (LISTEN)
tahoe   17548 root    8u     IPv4 1009083       0t0      TCP localhost:8022 (LISTEN)
tahoe   17548 root    9u  a_inode     0,8         0        4 [eventpoll]
tahoe   17548 root   10r     FIFO     0,7       0t0  1006713 pipe
tahoe   17548 root   11w     FIFO     0,7       0t0  1006713 pipe
tahoe   17548 root   12u     IPv4 1008143       0t0      TCP localhost:3456 (LISTEN)
tahoe   17548 root   13w     FIFO     0,7       0t0  1008144 pipe
tahoe   17548 root   14u     IPv4 1007115       0t0      TCP 192.168.8.1:60535->ec2-54-174-161-75.compute-1.amazonaws.com:12345 (ESTABLISHED)
tahoe   17548 root   15u     IPv4 1055689       0t0      TCP localhost:3456->localhost:51674 (ESTABLISHED)
tahoe   17548 root   16u     IPv4 1007119       0t0      TCP 192.168.8.1:58407->ec2-54-174-161-75.compute-1.amazonaws.com:12346 (ESTABLISHED)
tahoe   17548 root   17r      CHR     1,9       0t0       13 /dev/urandom
tahoe   17548 root   18u     IPv4 1008169       0t0      TCP undercity:34288->undercity:ldap (ESTABLISHED)
tahoe   17548 root   19r      CHR     1,9       0t0       13 /dev/urandom
tahoe   17548 root   20u      REG    0,17 475389401 11584559 /root/.tahoe/tmp/tmp0Is820 (deleted)

with this twistd.log:

2014-12-19 00:43:02+0000 [-] Log opened.
2014-12-19 00:43:02+0000 [-] twistd 14.0.2 (/usr/bin/python2.7 2.7.8) starting up.
2014-12-19 00:43:02+0000 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2014-12-19 00:43:02+0000 [-] Listener starting on 51077
2014-12-19 00:43:02+0000 [-] SSHFactory starting on 8022
2014-12-19 00:43:02+0000 [-] Starting factory <allmydata.frontends.sftpd.SSHFactory instance at 0x7f2fee40fe60>
2014-12-19 00:43:02+0000 [-] NevowSite starting on 3456
2014-12-19 00:43:02+0000 [-] Starting factory <nevow.appserver.NevowSite instance at 0x7f2fedfc1440>
2014-12-19 00:43:02+0000 [-] My pid: 17548
2014-12-19 00:43:02+0000 [-] DatagramProtocol starting on 44901
2014-12-19 00:43:02+0000 [-] Starting protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f2fedb7ad88>
2014-12-19 00:43:02+0000 [-] (UDP Port 44901 Closed)
2014-12-19 00:43:02+0000 [-] Stopping protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f2fedb7ad88>
2014-12-19 00:59:39+0000 [-] Exception rendering error page:
2014-12-19 00:59:39+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
	    cb(*args, **kwargs)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
	    self._startRunCallbacks(result)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed
	    handler.renderHTTP_exception(ctx, reason)
	  File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception
	    return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR)
	  File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple
	    req.finishRequest(False)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
	
2014-12-19 00:59:39+0000 [-] 'Original exception:'
2014-12-19 00:59:39+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks
	    self._runCallbacks()
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda>
	    self._read_encrypted(length, ciphertext, hash_only, d2))
	  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted
	    d = defer.maybeDeferred(self.original.read, size)
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred
	    result = f(*args, **kw)
	  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read
	    return defer.succeed([self._filehandle.read(length)])
	exceptions.ValueError: I/O operation on closed file
	
2014-12-19 00:59:39+0000 [-] Unhandled error in Deferred:
2014-12-19 00:59:39+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent
	    call.func(*call.args, **call.kw)
	  File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
	    cb(*args, **kwargs)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
	    self._startRunCallbacks(result)
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
	    self._runCallbacks()
	--- <exception caught here> ---
	  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
	    current.result = callback(current.result, *args, **kw)
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed
	    request.finishRequest( False )
	  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
	    server.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
	    return http.Request.finish(self)
	  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
	    "Request.finish called on a request after its connection was lost; "
	exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.

Erstwhile customer AB reports this result from lsof: ``` COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME tahoe 17548 root cwd DIR 0,17 196 7835586 /root/.tahoe tahoe 17548 root rtd DIR 0,17 792 256 / tahoe 17548 root txt REG 0,17 6160 7145804 /usr/bin/python2.7 tahoe 17548 root mem REG 0,15 7145804 /usr/bin/python2.7 (path dev=0,17) tahoe 17548 root mem REG 0,15 2324166 /usr/lib64/libexpat.so.1.6.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 7145964 /usr/lib64/python2.7/lib-dynload/pyexpat.so (path dev=0,17) tahoe 17548 root mem REG 0,15 5586190 /lib64/libnss_ldap-2.19.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9100932 /lib64/libnss_dns-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9514490 /usr/lib64/libgpg-error.so.0.13.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180104 /usr/lib64/samba/libflag_mapping.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9253323 /usr/lib64/libhogweed.so.2.5 (path dev=0,17) tahoe 17548 root mem REG 0,15 9253322 /usr/lib64/libnettle.so.4.7 (path dev=0,17) tahoe 17548 root mem REG 0,15 3318025 /usr/lib64/libtasn1.so.6.3.2 (path dev=0,17) tahoe 17548 root mem REG 0,15 1433815 /usr/lib64/libheimntlm.so.0.1.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 9100703 /lib64/libcrypt-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 1434113 /usr/lib64/libroken.so.18.1.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 1433812 /usr/lib64/libhcrypto.so.4.1.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 9250241 /usr/lib64/libsqlite3.so.0.8.6 (path dev=0,17) tahoe 17548 root mem REG 0,15 1434239 /usr/lib64/libwind.so.0.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 1433822 /usr/lib64/libhx509.so.5.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 1433814 /usr/lib64/libheimbase.so.1.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 3341999 /usr/lib64/libgcrypt.so.20.0.2 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180112 /usr/lib64/samba/libauth_sam_reply.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180092 /usr/lib64/libndr-krb5pac.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180113 /usr/lib64/samba/libldbsamba.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180106 /usr/lib64/samba/libsamdb-common.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180120 /usr/lib64/libsamdb.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180091 /usr/lib64/samba/libndr-samba.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180119 /usr/lib64/samba/libsamba-modules.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180111 /usr/lib64/samba/libcliauth.so (path dev=0,17) tahoe 17548 root mem REG 0,15 1433478 /usr/lib64/libasn1.so.8.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 9823998 /usr/lib64/libldb.so.1.1.18 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180098 /usr/lib64/samba/libasn1util.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180107 /usr/lib64/samba/libcli-ldap-common.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9571157 /usr/lib64/libgnutls.so.28.41.2 (path dev=0,17) tahoe 17548 root mem REG 0,15 3386138 /usr/lib64/libsasl2.so.3.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 9100934 /lib64/libresolv-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 3093872 /lib64/libattr.so.1.1.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180096 /usr/lib64/libndr-nbt.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 9637656 /usr/lib64/libntdb.so.1.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180108 /usr/lib64/samba/libutil_ntdb.so (path dev=0,17) tahoe 17548 root mem REG 0,15 3378309 /lib64/libcom_err.so.2.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 1433737 /usr/lib64/libgssapi.so.3.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 1433897 /usr/lib64/libkrb5.so.26.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180094 /usr/lib64/samba/libcli-nbt.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180115 /usr/lib64/samba/libauthkrb5.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180103 /usr/lib64/libsamba-credentials.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180117 /usr/lib64/libgensec.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180186 /usr/lib64/samba/libsecrets3.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180109 /usr/lib64/samba/libkrb5samba.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180128 /usr/lib64/samba/libcli_cldap.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180083 /usr/lib64/samba/libaddns.so (path dev=0,17) tahoe 17548 root mem REG 0,15 6249370 /usr/lib64/libldap-2.4.so.2.10.3 (path dev=0,17) tahoe 17548 root mem REG 0,15 9629470 /usr/lib64/libtdb.so.1.3.3 (path dev=0,17) tahoe 17548 root mem REG 0,15 6249372 /usr/lib64/liblber-2.4.so.2.10.3 (path dev=0,17) tahoe 17548 root mem REG 0,15 3154798 /lib64/libcap.so.2.22 (path dev=0,17) tahoe 17548 root mem REG 0,15 9101141 /lib64/libnsl-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180101 /usr/lib64/libndr-standard.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180084 /usr/lib64/samba/libserver-role.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180090 /usr/lib64/libsamba-hostconfig.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180118 /usr/lib64/samba/libsmb_transport.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180085 /usr/lib64/samba/libtdb-wrap.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180082 /usr/lib64/samba/libutil_setid.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180199 /usr/lib64/samba/libsmbd_shim.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180095 /usr/lib64/samba/libsamba-security.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180099 /usr/lib64/samba/libsamba-sockets.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180194 /usr/lib64/samba/libutil_reg.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180197 /usr/lib64/samba/libsamba3-util.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180116 /usr/lib64/samba/libcli_smb_common.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180087 /usr/lib64/libndr.so.0.0.2 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180114 /usr/lib64/samba/libutil_tdb.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180080 /usr/lib64/samba/liberrors.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180192 /usr/lib64/samba/libCHARSET3.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180110 /usr/lib64/samba/libdbwrap.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180079 /usr/lib64/samba/libccan.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180097 /usr/lib64/libtevent-util.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180078 /usr/lib64/samba/libinterfaces.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180193 /usr/lib64/samba/libsmbregistry.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9621400 /usr/lib64/libtevent.so.0.9.22 (path dev=0,17) tahoe 17548 root mem REG 0,15 9100737 /lib64/librt-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9584083 /usr/lib64/libtalloc.so.2.1.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180271 /usr/lib64/samba/libgse.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180191 /usr/lib64/libsmbconf.so.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180077 /usr/lib64/samba/libreplace.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10180081 /usr/lib64/libsamba-util.so.0.0.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 10180313 /usr/lib64/libnss_wins.so.2 (path dev=0,17) tahoe 17548 root mem REG 0,15 9100990 /lib64/libnss_files-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9454529 /usr/lib64/python2.7/site-packages/Crypto/Util/_counter.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2409990 /usr/lib64/libgmp.so.10.2.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 9454528 /usr/lib64/python2.7/site-packages/Crypto/PublicKey/_fastmath.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9454518 /usr/lib64/python2.7/site-packages/Crypto/Cipher/_AES.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145956 /usr/lib64/python2.7/lib-dynload/resource.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145940 /usr/lib64/python2.7/lib-dynload/syslog.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2321727 /lib64/libbz2.so.1.0.6 (path dev=0,17) tahoe 17548 root mem REG 0,15 7145963 /usr/lib64/python2.7/lib-dynload/bz2.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145872 /usr/lib64/python2.7/lib-dynload/_bisect.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9484347 /usr/lib64/python2.7/site-packages/simplejson/_speedups.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145816 /usr/lib64/python2.7/lib-dynload/array.so (path dev=0,17) tahoe 17548 root mem REG 0,15 6895662 /usr/lib64/python2.7/site-packages/zfec/_fec.so (path dev=0,17) tahoe 17548 root mem REG 0,15 6894822 /usr/lib64/python2.7/site-packages/pycryptopp/publickey/ed25519/_ed25519.so (path dev=0,17) tahoe 17548 root mem REG 0,15 4650844 /usr/lib64/gcc/x86_64-pc-linux-gnu/4.8.3/libgcc_s.so.1 (path dev=0,17) tahoe 17548 root mem REG 0,15 4651118 /usr/lib64/gcc/x86_64-pc-linux-gnu/4.8.3/libstdc++.so.6.0.19 (path dev=0,17) tahoe 17548 root mem REG 0,15 6892940 /usr/lib64/libcrypto++.so.0.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 6894823 /usr/lib64/python2.7/site-packages/pycryptopp/_pycryptopp.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145937 /usr/lib64/python2.7/lib-dynload/cPickle.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145942 /usr/lib64/python2.7/lib-dynload/_csv.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145925 /usr/lib64/python2.7/lib-dynload/_json.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145928 /usr/lib64/python2.7/lib-dynload/unicodedata.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145952 /usr/lib64/python2.7/lib-dynload/termios.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2859901 /usr/lib64/python2.7/site-packages/cryptography/_Cryptography_cffi_36a40ff0x2bad1bae.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9454526 /usr/lib64/python2.7/site-packages/Crypto/Cipher/_DES3.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9552920 /usr/lib64/python2.7/site-packages/_cffi_backend.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2344194 /usr/lib64/libffi.so.6.0.2 (path dev=0,17) tahoe 17548 root mem REG 0,15 7145976 /usr/lib64/python2.7/lib-dynload/_ctypes.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9465422 /usr/lib64/python2.7/site-packages/zope/interface/_zope_interface_coptimizations.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145936 /usr/lib64/python2.7/lib-dynload/select.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145932 /usr/lib64/python2.7/lib-dynload/parser.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145931 /usr/lib64/python2.7/lib-dynload/fcntl.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145934 /usr/lib64/python2.7/lib-dynload/_locale.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2756485 /usr/lib64/libssl.so.1.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 7145945 /usr/lib64/python2.7/lib-dynload/_ssl.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145947 /usr/lib64/python2.7/lib-dynload/_socket.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145845 /usr/lib64/python2.7/lib-dynload/_random.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2756484 /usr/lib64/libcrypto.so.1.0.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 7145946 /usr/lib64/python2.7/lib-dynload/_hashlib.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145835 /usr/lib64/python2.7/lib-dynload/math.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145840 /usr/lib64/python2.7/lib-dynload/datetime.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145926 /usr/lib64/python2.7/lib-dynload/_functools.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145959 /usr/lib64/python2.7/lib-dynload/zlib.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145832 /usr/lib64/python2.7/lib-dynload/strop.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145938 /usr/lib64/python2.7/lib-dynload/cStringIO.so (path dev=0,17) tahoe 17548 root mem REG 0,15 2658860 /lib64/libz.so.1.2.8 (path dev=0,17) tahoe 17548 root mem REG 0,15 7145962 /usr/lib64/python2.7/lib-dynload/binascii.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145933 /usr/lib64/python2.7/lib-dynload/grp.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145870 /usr/lib64/python2.7/lib-dynload/_heapq.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145838 /usr/lib64/python2.7/lib-dynload/itertools.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145883 /usr/lib64/python2.7/lib-dynload/operator.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145863 /usr/lib64/python2.7/lib-dynload/_collections.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145811 /usr/lib64/python2.7/lib-dynload/_struct.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145833 /usr/lib64/python2.7/lib-dynload/time.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7145884 /usr/lib64/python2.7/lib-dynload/_io.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9103048 /usr/lib64/locale/locale-archive (path dev=0,17) tahoe 17548 root mem REG 0,15 9100632 /lib64/libm-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9101238 /lib64/libutil-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9100630 /lib64/libdl-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9101312 /lib64/libc-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 9102815 /lib64/libpthread-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 7141028 /usr/lib64/libpython2.7.so.1.0 (path dev=0,17) tahoe 17548 root mem REG 0,15 9101310 /lib64/ld-2.20.so (path dev=0,17) tahoe 17548 root mem REG 0,15 10179068 /usr/share/samba/codepages/lowcase.dat (path dev=0,17) tahoe 17548 root mem REG 0,15 10179069 /usr/share/samba/codepages/upcase.dat (path dev=0,17) tahoe 17548 root 0u CHR 1,3 0t0 8 /dev/null tahoe 17548 root 1u CHR 1,3 0t0 8 /dev/null tahoe 17548 root 2u CHR 1,3 0t0 8 /dev/null tahoe 17548 root 3u REG 0,17 47363 8357894 /root/.tahoe/logs/twistd.log tahoe 17548 root 4r CHR 1,9 0t0 13 /dev/urandom tahoe 17548 root 5r FIFO 0,7 0t0 1009081 pipe tahoe 17548 root 6r FIFO 0,7 0t0 1008144 pipe tahoe 17548 root 7u IPv4 1009082 0t0 TCP *:51077 (LISTEN) tahoe 17548 root 8u IPv4 1009083 0t0 TCP localhost:8022 (LISTEN) tahoe 17548 root 9u a_inode 0,8 0 4 [eventpoll] tahoe 17548 root 10r FIFO 0,7 0t0 1006713 pipe tahoe 17548 root 11w FIFO 0,7 0t0 1006713 pipe tahoe 17548 root 12u IPv4 1008143 0t0 TCP localhost:3456 (LISTEN) tahoe 17548 root 13w FIFO 0,7 0t0 1008144 pipe tahoe 17548 root 14u IPv4 1007115 0t0 TCP 192.168.8.1:60535->ec2-54-174-161-75.compute-1.amazonaws.com:12345 (ESTABLISHED) tahoe 17548 root 15u IPv4 1055689 0t0 TCP localhost:3456->localhost:51674 (ESTABLISHED) tahoe 17548 root 16u IPv4 1007119 0t0 TCP 192.168.8.1:58407->ec2-54-174-161-75.compute-1.amazonaws.com:12346 (ESTABLISHED) tahoe 17548 root 17r CHR 1,9 0t0 13 /dev/urandom tahoe 17548 root 18u IPv4 1008169 0t0 TCP undercity:34288->undercity:ldap (ESTABLISHED) tahoe 17548 root 19r CHR 1,9 0t0 13 /dev/urandom tahoe 17548 root 20u REG 0,17 475389401 11584559 /root/.tahoe/tmp/tmp0Is820 (deleted) ``` with this twistd.log: ``` 2014-12-19 00:43:02+0000 [-] Log opened. 2014-12-19 00:43:02+0000 [-] twistd 14.0.2 (/usr/bin/python2.7 2.7.8) starting up. 2014-12-19 00:43:02+0000 [-] reactor class: twisted.internet.epollreactor.EPollReactor. 2014-12-19 00:43:02+0000 [-] Listener starting on 51077 2014-12-19 00:43:02+0000 [-] SSHFactory starting on 8022 2014-12-19 00:43:02+0000 [-] Starting factory <allmydata.frontends.sftpd.SSHFactory instance at 0x7f2fee40fe60> 2014-12-19 00:43:02+0000 [-] NevowSite starting on 3456 2014-12-19 00:43:02+0000 [-] Starting factory <nevow.appserver.NevowSite instance at 0x7f2fedfc1440> 2014-12-19 00:43:02+0000 [-] My pid: 17548 2014-12-19 00:43:02+0000 [-] DatagramProtocol starting on 44901 2014-12-19 00:43:02+0000 [-] Starting protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f2fedb7ad88> 2014-12-19 00:43:02+0000 [-] (UDP Port 44901 Closed) 2014-12-19 00:43:02+0000 [-] Stopping protocol <twisted.internet.protocol.DatagramProtocol instance at 0x7f2fedb7ad88> 2014-12-19 00:59:39+0000 [-] Exception rendering error page: 2014-12-19 00:59:39+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed handler.renderHTTP_exception(ctx, reason) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple req.finishRequest(False) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. 2014-12-19 00:59:39+0000 [-] 'Original exception:' 2014-12-19 00:59:39+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda> self._read_encrypted(length, ciphertext, hash_only, d2)) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted d = defer.maybeDeferred(self.original.read, size) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred result = f(*args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read return defer.succeed([self._filehandle.read(length)]) exceptions.ValueError: I/O operation on closed file 2014-12-19 00:59:39+0000 [-] Unhandled error in Deferred: 2014-12-19 00:59:39+0000 [-] Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed request.finishRequest( False ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. ```

zooko commented 2014-12-19 02:09:06 +00:00

Author

Copy link

AB pressed the Report An Incident button, and mailed me the resulting incident report file. I'll attach it to this ticket, but here is the first evidence of weirdness in it:

local#12548 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.491843Z): upload failed
 FAILURE:
 [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last):
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks
     self._runCallbacks()
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
     current.result = callback(current.result, *args, **kw)
   File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda>
     self._read_encrypted(length, ciphertext, hash_only, d2))
   File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted
     d = defer.maybeDeferred(self.original.read, size)
 --- <exception caught here> ---
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred
     result = f(*args, **kw)
   File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read
     return defer.succeed([self._filehandle.read(length)])
 exceptions.ValueError: I/O operation on closed file
 ]
local#12549 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.608912Z): aborting shareholders
local#12550 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.618792Z): Exception rendering error page:
local#12551 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.646960Z): Unhandled Error
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
    self._startRunCallbacks(result)
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
    self._runCallbacks()
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
--- <exception caught here> ---
  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed
    handler.renderHTTP_exception(ctx, reason)
  File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception
    return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR)
  File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple
    req.finishRequest(False)
  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
    server.Request.finish(self)
  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
    return http.Request.finish(self)
  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
    "Request.finish called on a request after its connection was lost; "
exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.

 FAILURE:
 [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last):
   File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
     cb(*args, **kwargs)
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
     self._startRunCallbacks(result)
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
     self._runCallbacks()
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
     current.result = callback(current.result, *args, **kw)
 --- <exception caught here> ---
   File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed
     handler.renderHTTP_exception(ctx, reason)
   File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception
     return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR)
   File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple
     req.finishRequest(False)
   File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
     server.Request.finish(self)
   File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
     return http.Request.finish(self)
   File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
     "Request.finish called on a request after its connection was lost; "
 exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
 ]
local#12552 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.852801Z): 'Original exception:'
local#12553 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.853193Z): Unhandled Error
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks
    self._runCallbacks()
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda>
    self._read_encrypted(length, ciphertext, hash_only, d2))
  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted
    d = defer.maybeDeferred(self.original.read, size)
--- <exception caught here> ---
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred
    result = f(*args, **kw)
  File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read
    return defer.succeed([self._filehandle.read(length)])
exceptions.ValueError: I/O operation on closed file

 FAILURE:
 [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last):
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks
     self._runCallbacks()
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
     current.result = callback(current.result, *args, **kw)
   File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda>
     self._read_encrypted(length, ciphertext, hash_only, d2))
   File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted
     d = defer.maybeDeferred(self.original.read, size)
 --- <exception caught here> ---
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred
     result = f(*args, **kw)
   File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read
     return defer.succeed([self._filehandle.read(length)])
 exceptions.ValueError: I/O operation on closed file
 ]
local#12554 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.855494Z): Unhandled error in Deferred:
local#12555 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.855931Z): Unhandled Error
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent
    call.func(*call.args, **call.kw)
  File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
    self._startRunCallbacks(result)
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
    self._runCallbacks()
--- <exception caught here> ---
  File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed
    request.finishRequest( False )
  File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
    server.Request.finish(self)
  File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
    return http.Request.finish(self)
  File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
    "Request.finish called on a request after its connection was lost; "
exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.

 FAILURE:
 [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last):
   File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent
     call.func(*call.args, **call.kw)
   File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn
     cb(*args, **kwargs)
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback
     self._startRunCallbacks(result)
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
     self._runCallbacks()
 --- <exception caught here> ---
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks
     current.result = callback(current.result, *args, **kw)
   File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed
     request.finishRequest( False )
   File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest
     server.Request.finish(self)
   File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish
     return http.Request.finish(self)
   File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish
     "Request.finish called on a request after its connection was lost; "
 exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
 ]

AB pressed the `Report An Incident` button, and mailed me the resulting incident report file. I'll attach it to this ticket, but here is the first evidence of weirdness in it: ``` local#12548 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.491843Z): upload failed FAILURE: [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda> self._read_encrypted(length, ciphertext, hash_only, d2)) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted d = defer.maybeDeferred(self.original.read, size) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred result = f(*args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read return defer.succeed([self._filehandle.read(length)]) exceptions.ValueError: I/O operation on closed file ] local#12549 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.608912Z): aborting shareholders local#12550 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.618792Z): Exception rendering error page: local#12551 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.646960Z): Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed handler.renderHTTP_exception(ctx, reason) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple req.finishRequest(False) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. FAILURE: [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 82, in processingFailed handler.renderHTTP_exception(ctx, reason) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 332, in renderHTTP_exception return self.simple(ctx, traceback, http.INTERNAL_SERVER_ERROR) File "/usr/lib64/python2.7/site-packages/allmydata/web/common.py", line 302, in simple req.finishRequest(False) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. ] local#12552 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.852801Z): 'Original exception:' local#12553 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.853193Z): Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda> self._read_encrypted(length, ciphertext, hash_only, d2)) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted d = defer.maybeDeferred(self.original.read, size) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred result = f(*args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read return defer.succeed([self._filehandle.read(length)]) exceptions.ValueError: I/O operation on closed file FAILURE: [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 295, in addCallbacks self._runCallbacks() File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 752, in <lambda> self._read_encrypted(length, ciphertext, hash_only, d2)) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 767, in _read_encrypted d = defer.maybeDeferred(self.original.read, size) --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 139, in maybeDeferred result = f(*args, **kw) File "/usr/lib64/python2.7/site-packages/allmydata/immutable/upload.py", line 1467, in read return defer.succeed([self._filehandle.read(length)]) exceptions.ValueError: I/O operation on closed file ] local#12554 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.855494Z): Unhandled error in Deferred: local#12555 rx(2014-12-19_01:06:25.269490Z) emit(2014-12-19_00:59:39.855931Z): Unhandled Error Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed request.finishRequest( False ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. FAILURE: [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/lib64/python2.7/site-packages/foolscap/eventual.py", line 26, in _turn cb(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 382, in callback self._startRunCallbacks(result) File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 577, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 91, in processingFailed request.finishRequest( False ) File "/usr/lib64/python2.7/site-packages/nevow/appserver.py", line 176, in finishRequest server.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/server.py", line 228, in finish return http.Request.finish(self) File "/usr/lib64/python2.7/site-packages/twisted/web/http.py", line 930, in finish "Request.finish called on a request after its connection was lost; " exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this. ] ```

zooko commented 2014-12-19 04:49:58 +00:00

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Okay here's a hypothesis. I need someone to verify this for me — warner, daira, dreid, ??

The hypothesis is that Nevow is close()'ing the temp file in stopProducing. The hypothesis is that Nevow is done producing, but Tahoe-LAFS isn't yet done consuming!

Okay here's a hypothesis. I need someone to verify this for me — warner, daira, dreid, ?? The hypothesis is that Nevow is `close()`'ing the temp file in [stopProducing](https://github.com/twisted/nevow/blob/master/nevow/static.py#L391). The hypothesis is that Nevow is done producing, but Tahoe-LAFS isn't yet done consuming!

daira commented 2014-12-19 23:18:39 +00:00

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Replying to zooko:

The hypothesis is that Nevow is close()'ing the temp file in stopProducing. The hypothesis is that Nevow is done producing, but Tahoe-LAFS isn't yet done consuming!

That seems plausible to me. To test it, we should instrument Nevow to log when it is closing the temp file; if this log entry comes just before the "I/O operation on closed file", then we've confirmed the hypothesis.

It also seems plausible that we can work around this by os.dup'ing the file handle when we get it (in render_{PUT,POST}), and closing our duplicate when we are finished. (I am assuming that Nevow cannot already have closed the file when we first get it; that would be a Nevow bug that we can't fix.)

Replying to [zooko](/tahoe-lafs/trac/issues/1794#issuecomment-390804): > The hypothesis is that Nevow is `close()`'ing the temp file in [stopProducing](https://github.com/twisted/nevow/blob/master/nevow/static.py#L391). The hypothesis is that Nevow is done producing, but Tahoe-LAFS isn't yet done consuming! That seems plausible to me. To test it, we should instrument Nevow to log when it is closing the temp file; if this log entry comes just before the "I/O operation on closed file", then we've confirmed the hypothesis. It also seems plausible that we can work around this by `os.dup`'ing the file handle when we get it (in `render_{PUT,POST}`), and closing our duplicate when we are finished. (I am assuming that Nevow cannot already have closed the file when we first get it; that would be a Nevow bug that we can't fix.)

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Reference: tahoe-lafs/trac#1794

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