* bpo-35493: Use Process.sentinel instead of sleeping for polling worker status in multiprocessing.Pool
* Use self-pipe pattern to avoid polling for changes
* Refactor some variable names and add comments
* Restore timeout and poll
* Use reader object only on wait()
* Recompute worker sentinels every time
* Remove timeout and use change notifier
* Refactor some methods to be overloaded by the ThreadPool, document the cache class and fix typos
Changes in this commit:
1. Use a _strong_ reference between the Pool and associated iterators
2. Rework PR #8450 to eliminate a cycle in the Pool.
There is no test in this commit because any test that automatically tests this behaviour needs to eliminate the pool before joining the pool to check that the pool object is garbaged collected/does not hang. But doing this will potentially leak threads and processes (see https://bugs.python.org/issue35413).
Fix a reference issue inside multiprocessing.Pool that caused the pool to remain alive if it was deleted without being closed or terminated explicitly.
* Make error message more informative
Replace assertions in error-reporting code with more-informative version that doesn't cause confusion over where and what the error is.
* Additional clarification + get travis to check
* Change from SystemError to TypeError
As suggested in PR comment by @pitrou, changing from SystemError; TypeError appears appropriate.
* NEWS file installation; ACKS addition (will do my best to justify it by additional work)
* Making current AssertionErrors in multiprocessing more informative
* Blurb added re multiprocessing managers.py, queues.py cleanup
* Further multiprocessing cleanup - went through pool.py
* Fix two asserts in multiprocessing/util.py
* Most asserts in multiprocessing more informative
* Didn't save right version
* Further work on multiprocessing error messages
* Correct typo
* Correct typo v2
* Blasted colon... serves me right for trying to work on two things at once
* Simplify NEWS entry
* Update 2017-08-18-17-16-38.bpo-5001.gwnthq.rst
* Update 2017-08-18-17-16-38.bpo-5001.gwnthq.rst
OK, never mind.
* Corrected (thanks to pitrou) error messages for notify
* Remove extraneous backslash in docstring.
* bpo-29861: release references to multiprocessing Pool tasks
Release references to tasks, their arguments and their results as soon
as they are finished, instead of keeping them alive until another task
arrives.
* Comments in test
module now takes an optional timeout argument in seconds. Timeout support
relies on the system threading library, so as to avoid a semi-busy wait
loop.
svn+ssh://pythondev@svn.python.org/python/trunk
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r78777 | florent.xicluna | 2010-03-08 00:49:03 +0100 (lun, 08 mar 2010) | 4 lines
Backport the Popen.poll() protection from subprocess to multiprocessing. See #1731717.
It should fix transient failures on test_multiprocessing.
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r78787 | florent.xicluna | 2010-03-08 08:21:16 +0100 (lun, 08 mar 2010) | 2 lines
Don't fail on a debug() statement, if the worker PID is (still) None.
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r78790 | florent.xicluna | 2010-03-08 12:01:39 +0100 (lun, 08 mar 2010) | 2 lines
On finalize, don't try to join not started process.
........
Pablo Galindo
Victor Stinner
Julien Palard
tzickel
Antoine Pitrou
Allen W. Smith, Ph.D
Serhiy Storchaka
Xiang Zhang
Charles-François Natali
Richard Oudkerk
Victor Stinner
Andrew Svetlov
Hynek Schlawack
Benjamin Peterson
Antoine Pitrou
Florent Xicluna
Charles-François Natali
Victor Stinner
R. David Murray
Ask Solem