[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3321: PyPy CI: allmydata.test.test_system.SystemTest sometimes fails

[Tahoe-LAFS]

#3321: PyPy CI: allmydata.test.test_system.SystemTest sometimes fails
--------------------------------+---------------------------
 Reporter:  sajith              |          Owner:  sajith
     Type:  defect              |         Status:  new
 Priority:  normal              |      Milestone:  undecided
Component:  dev-infrastructure  |        Version:  n/a
 Keywords:                      |  Launchpad Bug:
--------------------------------+---------------------------
 There are these intermittent failures on pypy2.7-buster on CircleCI
 ([https://app.circleci.com/pipelines/github/sajith/tahoe-
 lafs/182/workflows/f793097c-4595-4479-afdb-52312e6d83f7/jobs/2472
 example]), which goes away when the task is restarted:

 {{{
 Traceback (most recent call last):
 testtools.testresult.real._StringException: Traceback (most recent call
 last):
   File "/tmp/tahoe-lafs.tox/pypy27-coverage/site-
 packages/twisted/internet/defer.py", line 654, in _runCallbacks
     current.result = callback(current.result, *args, **kw)
   File "/tmp/tahoe-lafs.tox/pypy27-coverage/site-
 packages/allmydata/test/test_system.py", line 2414, in <lambda>
     d.addCallback(lambda out_err: self.failUnlessEqual(out_err[0],
 datas[0]))
   File "/tmp/tahoe-lafs.tox/pypy27-coverage/site-
 packages/twisted/trial/_synctest.py", line 434, in assertEqual
     super(_Assertions, self).assertEqual(first, second, msg)
   File "/opt/pypy/lib-python/2.7/unittest/case.py", line 513, in
 assertEqual
     assertion_func(first, second, msg=msg)
   File "/opt/pypy/lib-python/2.7/unittest/case.py", line 506, in
 _baseAssertEqual
     raise self.failureException(msg)
 twisted.trial.unittest.FailTest: '' != 'data to be uploaded: file0\n'
 }}}


 Possibly related to #3299.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3321>
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