[New-bugs-announce] [issue15152] test_subprocess fqailures on awfully slow builtbots

[Charles-François Natali]

New submission from Charles-François Natali <neologix at free.fr>:

Some test_subprocess tests are failing on really slow buildbots, such as the Ubtuntu ARM one:
"""
======================================================================
ERROR: test_wait_timeout (test.test_subprocess.ProcessTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/var/lib/buildbot/buildarea/3.x.warsaw-ubuntu-arm/build/Lib/test/test_subprocess.py", line 718, in test_wait_timeout
    self.assertEqual(p.wait(timeout=3), 0)
  File "/var/lib/buildbot/buildarea/3.x.warsaw-ubuntu-arm/build/Lib/subprocess.py", line 1494, in wait
    raise TimeoutExpired(self.args, timeout)
subprocess.TimeoutExpired: Command '['/var/lib/buildbot/buildarea/3.x.warsaw-ubuntu-arm/build/python', '-c', 'import time; time.sleep(0.1)']' timed out after 3 seconds

======================================================================
FAIL: test_check_output_timeout (test.test_subprocess.ProcessTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/var/lib/buildbot/buildarea/3.x.warsaw-ubuntu-arm/build/Lib/test/test_subprocess.py", line 140, in test_check_output_timeout
    self.assertEqual(c.exception.output, b'BDFL')
AssertionError: b'' != b'BDFL'

======================================================================
FAIL: test_check_output_timeout (test.test_subprocess.ProcessTestCaseNoPoll)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/var/lib/buildbot/buildarea/3.x.warsaw-ubuntu-arm/build/Lib/test/test_subprocess.py", line 140, in test_check_output_timeout
    self.assertEqual(c.exception.output, b'BDFL')
AssertionError: b'' != b'BDFL'
"""

The timeouts for those tests are already at 3 seconds.
We could double them to 6 seconds and see if things get better: that would increase the running time on all the buildbots, though. Any other idea?

----------
components: Tests
keywords: buildbot
messages: 163557
nosy: neologix, pitrou
priority: normal
severity: normal
stage: needs patch
status: open
title: test_subprocess fqailures on awfully slow builtbots
type: behavior
versions: Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15152>
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