New submission from Orion Poplawski:

Trying to build Python 3.4.0 for Fedora we are seeing test_asyncio 
test_subprocess_send_signal hang every time, on all architectures.  
Unfortunately I cannot reproduce this locally.  These builds are done inside of 
chroots, and the host has the kernel version 3.12.8-300.fc20 which is used for 
all build targets.  We see hangs building for Fedora Rawhide and RHEL 7.  We do 
*not* see hangs on our COPR builders which among other possible differences use 
RHEL6 hosts with kernel 2.6.32-358.el6.

I've attached an strace of the hanging test.  The calling process seems to be 
stuck in epoll_wait().

Tried using the watchdog patch from issue #19652 but that doesn't seem to 
manage to kill things.  In fact, the tests are never killed but the 1 hour 
timeout in the test runner.

----------
files: test_signal.out
messages: 216392
nosy: opoplawski
priority: normal
severity: normal
status: open
title: test_asyncio: test_subprocess_send_signal hangs on Fedora builders
type: behavior
versions: Python 3.4
Added file: http://bugs.python.org/file34899/test_signal.out

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue21247>
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