James Spurin added the comment:
I encountered similar issues to those discussed in this issue whilst compiling
3.4.1 on 'Red Hat Enterprise Linux Server release 6.5 (Santiago)'
In particular, the following tests were failing -
[root@lonlx90800 ~]# /local/0/python-3.4.1/bin/python3
/local/0/python-3.4.1/lib/python3.4/test/test_asyncio/test_subprocess.py
F.......F.......
======================================================================
FAIL: test_broken_pipe (__main__.SubprocessFastWatcherTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/local/0/python-3.4.1/lib/python3.4/test/test_asyncio/test_subprocess.py",
line 129, in test_broken_pipe
self.loop.run_until_complete(proc.communicate(large_data))
AssertionError: BrokenPipeError not raised
======================================================================
FAIL: test_broken_pipe (__main__.SubprocessSafeWatcherTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/local/0/python-3.4.1/lib/python3.4/test/test_asyncio/test_subprocess.py",
line 129, in test_broken_pipe
self.loop.run_until_complete(proc.communicate(large_data))
AssertionError: BrokenPipeError not raised
In this case, the issues are being caused by the following kernel parameters
that we have for our default build -
#########################
## TIBCO network tuning #
#########################
net.core.rmem_default = 33554432
net.core.wmem_default = 33554432
net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
Toggling the support.PIPE_MAX_SIZE to +32MB or temporarily removing these
parameters mitigates the issue. Is there a better way of calculating
support.PIPE_MAX_SIZE so it is reflective of the actual OS value?
----------
nosy: +spurin
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17835>
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