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test_multiprocessing_forkserver: test_forkserver_sigkill() fails randomly · Issue #78221 · python/cpython · GitHub

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test_multiprocessing_forkserver: test_forkserver_sigkill() fails randomly #78221

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test_multiprocessing_forkserver: test_forkserver_sigkill() fails randomly#78221
Labels
3.7 (EOL)end of life3.8 (EOL)end of lifetestsTests in the Lib/test dir

Description

vstinner
opened on Jul 4, 2018
BPO 34040
Nosy @vstinner, @miss-islington
PRs
  • bpo-34040, multiprocessing: Fix test_forkserver_sigkill() #8081
  • [3.7] bpo-34040, multiprocessing: Fix test_forkserver_sigkill() (GH-8081) #8084
  • [3.6] bpo-34040, multiprocessing: Fix test_forkserver_sigkill() (GH-8081) #8085
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2018-07-04.10:35:04.404>
created_at = <Date 2018-07-04.07:49:19.169>
labels = ['3.8', '3.7', 'tests']
title = 'test_multiprocessing_forkserver: test_forkserver_sigkill() fails randomly'
updated_at = <Date 2018-07-04.10:35:04.403>
user = 'https://github.com/vstinner'

    bugs.python.org fields:

    activity = <Date 2018-07-04.10:35:04.403>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2018-07-04.10:35:04.404>
closer = 'vstinner'
components = ['Tests']
creation = <Date 2018-07-04.07:49:19.169>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 34040
keywords = ['patch']
message_count = 7.0
messages = ['321015', '321017', '321024', '321025', '321028', '321030', '321031']
nosy_count = 2.0
nosy_names = ['vstinner', 'miss-islington']
pr_nums = ['8081', '8084', '8085']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue34040'
versions = ['Python 3.6', 'Python 3.7', 'Python 3.8']

    Activity

    1. vstinner commented on Jul 4, 2018

      vstinner
      on Jul 4, 2018
      MemberAuthor

      AMD64 FreeBSD 10.x Shared 3.x:
      http://buildbot.python.org/all/#/builders/87/builds/1137

      ======================================================================
      FAIL: test_forkserver_sigkill (test.test_multiprocessing_forkserver.WithProcessesTestProcess)
      ----------------------------------------------------------------------

      Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10/build/Lib/test/_test_multiprocessing.py", line 680, in test_forkserver_sigkill
    self.check_forkserver_death(signal.SIGKILL)
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10/build/Lib/test/_test_multiprocessing.py", line 670, in check_forkserver_death
    self.assertTrue(evt.is_set())
AssertionError: False is not true

      Re-running test 'test_multiprocessing_forkserver' in verbose mode
      Ran 310 tests in 100.124s
      OK (skipped=27)

    2. vstinner
      added
      3.7 (EOL)end of life
      3.8 (EOL)end of life
      testsTests in the Lib/test dir
      on Jul 4, 2018

    3. vstinner commented on Jul 4, 2018

      vstinner
      on Jul 4, 2018
      MemberAuthor

      Another example of failure:
      https://bugs.python.org/issue31687#msg307355

      x86 Tiger 3.x:

      http://buildbot.python.org/all/#/builders/30/builds/260

      ======================================================================
      FAIL: test_semaphore_tracker (test.test_multiprocessing_forkserver.TestSemaphoreTracker)
      ----------------------------------------------------------------------

      Traceback (most recent call last):
  File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/_test_multiprocessing.py", line 4380, in test_semaphore_tracker
    _multiprocessing.sem_unlink(name2)
AssertionError: OSError not raised

      ======================================================================
      FAIL: test_forkserver_sigkill (test.test_multiprocessing_forkserver.WithProcessesTestProcess)
      ----------------------------------------------------------------------

      Traceback (most recent call last):
  File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/_test_multiprocessing.py", line 653, in test_forkserver_sigkill
    self.check_forkserver_death(signal.SIGKILL)
  File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/_test_multiprocessing.py", line 643, in check_forkserver_death
    self.assertTrue(evt.is_set())
AssertionError: False is not true

    4. vstinner commented on Jul 4, 2018

      vstinner
      on Jul 4, 2018
      MemberAuthor

      New changeset 07888e1 by Victor Stinner in branch 'master':
      bpo-34040, multiprocessing: Fix test_forkserver_sigkill() (GH-8081)
      07888e1

    5. vstinner commented on Jul 4, 2018

      vstinner
      on Jul 4, 2018
      MemberAuthor

      Python 2.7 is not affected: it has no forkserver.

    6. miss-islington commented on Jul 4, 2018

      miss-islington
      on Jul 4, 2018
      Contributor

      New changeset eb700f8 by Miss Islington (bot) in branch '3.7':
      bpo-34040, multiprocessing: Fix test_forkserver_sigkill() (GH-8081)
      eb700f8

    7. miss-islington commented on Jul 4, 2018

      miss-islington
      on Jul 4, 2018
      Contributor

      New changeset ae23d8d by Miss Islington (bot) in branch '3.6':
      bpo-34040, multiprocessing: Fix test_forkserver_sigkill() (GH-8081)
      ae23d8d

    8. vstinner commented on Jul 4, 2018

      vstinner
      on Jul 4, 2018
      MemberAuthor

      I doubled the sleep: it should be better. If not, we can easily increase even more the sleep ;-)

    9. vstinner
      closed this as completedon Jul 4, 2018
    10. ezio-melotti
      transferred this issue fromon Apr 10, 2022
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