[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

STINNER Victor added the comment: I created a new repository just for this issue: http://hg.python.org/sandbox/issue21645 I added a lot of debug. It looks like a race condition: the SIGCHLD signal is handled in a thread B (a C thread, not a Python), whereas the asyncio event loop is running

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

STINNER Victor added the comment: I'm running tests on the buildbot AMD64 FreeBSD 9.0 custom: http://buildbot.python.org/all/builders/AMD64%20FreeBSD%209.0%20custom/builds/27/steps/test/logs/stdio -- ___ Python tracker rep...@bugs.python.org

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

STINNER Victor added the comment: (1) the thread B gets the SIGCHLD signal: it writes a byte into the self pipe of the event loop C signal_handler: sig_num=20, thread=34468857856 trip_signal(20): write() (2) in the main thread, the event loop is awaken by the write in the pipe... but

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

Roundup Robot added the comment: New changeset a0e6a370755f by Victor Stinner in branch 'default': Issue #21645: Add debug code to analyze a failure on FreeBSD 9 http://hg.python.org/cpython/rev/a0e6a370755f -- ___ Python tracker

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

Roundup Robot added the comment: New changeset dbf991650441 by Victor Stinner in branch 'default': Issue #21645: test_asyncio, log debug trace into sys.__stderr__, not in http://hg.python.org/cpython/rev/dbf991650441 -- ___ Python tracker

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

STINNER Victor added the comment: Buildbot where the issue occurs: http://buildbot.python.org/all/builders/AMD64%20FreeBSD%209.0%203.x/ -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21645

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

Roundup Robot added the comment: New changeset 69d474dab479 by Victor Stinner in branch 'default': Issue #21645: asyncio: add a watchdog in test_read_all_from_pipe_reader() for http://hg.python.org/cpython/rev/69d474dab479 -- nosy: +python-dev ___

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

Changes by Giampaolo Rodola' g.rod...@gmail.com: -- components: +Asyncio ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21645 ___ ___

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

New submission from STINNER Victor: http://buildbot.python.org/all/builders/AMD64%20FreeBSD%209.0%203.4/builds/191/steps/test/logs/stdio [ 8/389] test_asyncio Timeout (1:00:00)! Thread 0x000801407400 (most recent call first): File

[issue21645] test_read_all_from_pipe_reader() of test_asyncio hangs on FreeBSD 9

Guido van Rossum added the comment: Maybe see Tulip issue 168? That test was added to support that. Maybe the fix doesn't work for this platform? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21645