[tahoe-lafs-trac-stream] [tahoe-lafs] #1084: nondeterministic failure of allmydata.test.test_system.SystemTest.test_upload_and_download_{random_key, convergent}

[tahoe-lafs]

#1084: nondeterministic failure of
allmydata.test.test_system.SystemTest.test_upload_and_download_{random_key,convergent}
----------------------------+-----------------------------------
     Reporter:  davidsarah  |      Owner:  somebody
         Type:  defect      |     Status:  new
     Priority:  major       |  Milestone:  undecided
    Component:  code        |    Version:  1.7β
   Resolution:              |   Keywords:  test upload heisenbug
Launchpad Bug:              |
----------------------------+-----------------------------------

Comment (by zooko):

 A problem with similar characteristics happened just now on Ruben's Fedora
 buildslave:

 failed:
 http://tahoe-lafs.org/buildbot/builders/Ruben%20Fedora/builds/864

 Ended with:

 {{{
 allmydata.test.test_system.SystemTest.test_upload_and_download_random_key
 ... Traceback (most recent call last):
   File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py",
 line 133, in maybeDeferred
     result = f(*args, **kw)
   File "/home/buildbot/tahoe/Ruben
 Fedora/build/src/allmydata/util/pollmixin.py", line 34, in _poll
     raise TimeoutError("PollMixin never saw %s return True" % check_f)
 allmydata.util.pollmixin.TimeoutError: PollMixin never saw <bound method
 SystemTest._check_connections of <allmydata.test.test_system.SystemTest
 testMethod=test_upload_and_download_random_key>> return True
 [ERROR]Traceback (most recent call last):
 Failure: twisted.internet.defer.TimeoutError:
 <allmydata.test.test_system.SystemTest
 testMethod=test_upload_and_download_random_key> (tearDown) still running
 at 3600.0 secs
 [ERROR]Traceback (most recent call last):
 Failure: twisted.trial.util.DirtyReactorAggregateError: Reactor was
 unclean.
 DelayedCalls: (set twisted.internet.base.DelayedCall.debug = True to
 debug)
 <DelayedCall 0x534e5f0 [39.4281477928s] called=0 cancelled=0
 LoopingCall<60>(CPUUsageMonitor.check, *(), **{})()>
 <DelayedCall 0x48e40e0 [39759.6027431s] called=0 cancelled=0
 LeaseCheckingCrawler.start_slice()>
 <DelayedCall 0x4bcb710 [99.8050701618s] called=0 cancelled=0
 BucketCountingCrawler.start_slice()>
 [ERROR]Traceback (most recent call last):
 Failure: twisted.trial.util.DirtyReactorAggregateError: Reactor was
 unclean.
 Selectables:
 <<class 'twisted.internet.tcp.Port'> of foolscap.pb.Listener on 42824>
 [ERROR]
 command timed out: 7200 seconds without output, attempting to kill
 process killed by signal 9
 program finished with exit code -1
 elapsedTime=11884.623658
 }}}

 rebuilt exact same version and passed:
 http://tahoe-lafs.org/buildbot/builders/Ruben%20Fedora/builds/865

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1084#comment:5>
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