[issue23713] intermittent failure of multiprocessing unit test test_imap_unordered_handle_iterable_exception

[Davin Potts]

New submission from Davin Potts:

test_imap_unordered_handle_iterable_exception fails intermittently on some platforms due to the test being too rigid (fragile) about the order of the items being iterated over which, as the name would imply, is not guaranteed.

Of the multiprocessing module's test modules, test_multiprocessing_fork, test_multiprocessing_forkserver, and test_multiprocessing_spawn all leverage the unit test test_imap_unordered_handle_iterable_exception in multiple different contexts.  There are thus multiple opportunities for test_imap_unordered_handle_iterable_exception to fail due to this fragility -- it's maybe a little bit surprising the test doesn't fail more often than it does.

A patch is forthcoming.

----------
assignee: davin
components: Tests
messages: 238553
nosy: davin, jnoller, sbt
priority: normal
severity: normal
status: open
title: intermittent failure of multiprocessing unit test test_imap_unordered_handle_iterable_exception
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23713>
_______________________________________