Commit Graph

353 Commits

Author SHA1 Message Date
Allen W. Smith, Ph.D 48d9823a0e bpo-5001, bpo-31169: Fix two uninformative asserts in multiprocessing/managers.py (#3078)
* 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)
2017-08-12 17:37:09 +02:00
Victor Stinner 2db64823c2 bpo-31019: Fix multiprocessing.Process.is_alive() (#2875)
multiprocessing.Process.is_alive() now removes the process from the
_children set if the process completed.

The change prevents leaking "dangling" processes.
2017-07-26 02:32:42 +02:00
Antoine Pitrou 3051f0b78e bpo-30919: shared memory allocation performance regression in multiprocessing (#2708)
* Fix #30919: shared memory allocation performance regression in multiprocessing

* Change strategy for Arena directory choice

* Add blurb
2017-07-23 13:05:26 +02:00
Antoine Pitrou 896145d9d2 bpo-26732: fix too many fds in processes started with the "forkserver" method (#2813)
* bpo-26732: fix too many fds in processes started with the "forkserver" method

A child process would inherit as many fds as the number of still-running children.

* Add blurb and test comment
2017-07-22 13:22:54 +02:00
Gareth Rees 3913bad495 bpo-19896: Add typecodes 'q' and 'Q' to multiprocessing.sharedctypes (#2741)
* bpo-19896: Add typcodes 'q' and 'Q' to multiprocessing.sharedctypes. Patch by Antony Lee.

* Add NEWS entry.

* Slightly tweak NEWS entry

Make it clear this is more of a fix rather than a new feature.
2017-07-21 12:35:33 +02:00
Vitor Pereira ba75af7130 bpo-30794: added kill() method to multiprocessing.Process (#2528)
* bpo-30794: added kill() method to multiprocessing.Process

* Added entries to documentation and NEWS

* Refactored test_terminate and test_kill

* Fix SIGTERM and SIGKILL being used on Windows for the tests

* Added "versionadded" marker to the documentation

* Fix trailing whitespace in doc
2017-07-18 17:34:23 +02:00
Victor Stinner 3b69d911c5 bpo-30886: Fix multiprocessing.Queue.join_thread() (#2642)
multiprocessing.Queue.join_thread() now waits until the thread
completes, even if the thread was started by the same process which
created the queue.

Fix the following warning which occurs randomly when running
test_handle_called_with_mp_queue of test_logging.QueueListenerTest:

Warning -- threading_cleanup() failed to cleanup -1 threads after 4 sec (count: 0, dangling: 1)
2017-07-10 12:45:21 +02:00
Antoine Pitrou 48350412b7 bpo-29293: multiprocessing.Condition.notify() lacks parameter `n` (#2480)
* bpo-29293: multiprocessing.Condition.notify() lacks parameter `n`

* Add NEWS blurb
2017-07-04 08:59:22 +02:00
Antoine Pitrou 79d37ae979 Clear potential ref cycle between Process and Process target (#2470)
* Clear potential ref cycle between Process and Process target

Besides Process.join() not being called, this was an indirect cause of bpo-30775.
The threading module already does this.

* Add issue reference
2017-06-28 12:29:08 +02:00
Antoine Pitrou 13e96cc596 Fix bpo-30596: Add close() method to multiprocessing.Process (#2010)
* Fix bpo-30596: Add close() method to multiprocessing.Process

* Raise ValueError if close() is called before the Process is finished running

* Add docs

* Add NEWS blurb
2017-06-24 19:22:23 +02:00
Antoine Pitrou 1eb6c0074d bpo-24484: Avoid race condition in multiprocessing cleanup (#2159)
* bpo-24484: Avoid race condition in multiprocessing cleanup

The finalizer registry can be mutated while inspected by multiprocessing
at process exit.

* Use test.support.start_threads()

* Add Misc/NEWS
2017-06-13 17:10:39 +02:00
Antoine Pitrou 2b5cc5ebaf bpo-30643: Fix race condition in signal wakeup in forkserver (followup to PR #1989) (#2139)
* Fix race condition in signal wakeup in forkserver (followup to PR #1989)

There's an admittedly well-known race condition where ECHILD can arrive
just before the C function epoll_wait() and the latter wouldn't therefore
return EINTR.  The solution is to use set_wakeup_fd(), which was designed
to avoid such race conditions.

* Reset wakeup fd in child
2017-06-13 09:46:06 +02:00
Antoine Pitrou dfd5f34634 Fix bpo-30589: improve Process.exitcode with forkserver (#1989)
* Fix bpo-30589: improve Process.exitcode with forkserver

When the child is killed, Process.exitcode should return -signum, not 255.

* Add Misc/NEWS
2017-06-12 15:28:19 +02:00
Victor Stinner 1b7863c3b6 bpo-30595: Fix multiprocessing.Queue.get(timeout) (#2027)
multiprocessing.Queue.get() with a timeout now polls its reader in
non-blocking mode if it succeeded to aquire the lock but the acquire
took longer than the timeout.

Co-Authored-By: Grzegorz Grzywacz <grzgrzgrz3@gmail.com>
2017-06-10 13:10:13 +02:00
Antoine Pitrou 346cbd351e bpo-16500: Allow registering at-fork handlers (#1715)
* bpo-16500: Allow registering at-fork handlers

* Address Serhiy's comments

* Add doc for new C API

* Add doc for new Python-facing function

* Add NEWS entry + doc nit
2017-05-27 17:50:54 +02:00
grzgrzgrz3 bc50f03db4 bpo-30414: multiprocessing.Queue._feed do not break from main loop on exc (#1683)
* bpo-30414: multiprocesing.Queue._feed do not break from main loop on exc

Queue background running thread was not handling exceptions correctly.
Any exception occurred inside thread (putting unpickable object) cause
feeder to finish running. After that every message put into queue is
silently ignored.

* bpo-30414: multiprocesing.Queue._feed do not break from main loop on exc

Queue background running thread was not handling exceptions correctly.
Any exception occurred inside thread (putting unpickable object) cause
feeder to finish running. After that every message put into queue is
silently ignored.
2017-05-25 16:22:57 +02:00
Jon Dufresne 3972628de3 bpo-30296 Remove unnecessary tuples, lists, sets, and dicts (#1489)
* Replaced list(<generator expression>) with list comprehension
* Replaced dict(<generator expression>) with dict comprehension
* Replaced set(<list literal>) with set literal
* Replaced builtin func(<list comprehension>) with func(<generator
  expression>) when supported (e.g. any(), all(), tuple(), min(), &
  max())
2017-05-18 07:35:54 -07:00
Xiang Zhang 6f75bc003a bpo-30301: Fix AttributeError when using SimpleQueue.empty() (#1601)
Under  *spawn* and *forkserver* start methods, SimpleQueue.empty() could
raise AttributeError due to not setting _poll in __setstate__.
2017-05-17 21:04:00 +08:00
Antoine Pitrou 6dd4d734ed bpo-30185: avoid KeyboardInterrupt tracebacks in forkserver (#1319)
* bpo-30185: avoid KeyboardInterrupt tracebacks in forkserver

* Tweak comment
2017-05-04 16:44:53 +02:00
Serhiy Storchaka 66bffd1663 bpo-30065: Fixed arguments validation in _posixsubprocess.fork_exec(). (#1110) 2017-04-19 21:12:46 +03:00
Serhiy Storchaka 5affd23e6f bpo-29762: More use "raise from None". (#569)
This hides unwanted implementation details from tracebacks.
2017-04-05 09:37:24 +03:00
Xiang Zhang 794623bdb2 bpo-28699: fix abnormal behaviour of pools in multiprocessing.pool (GH-693)
an exception raised at the very first of an iterable would cause pools behave abnormally
(swallow the exception or hang)
2017-03-29 11:58:54 +08:00
Victor Stinner d6debb24e0 bpo-29919: Remove unused imports found by pyflakes (#137)
Make also minor PEP8 coding style fixes on modified imports.
2017-03-27 16:05:26 +02:00
Antoine Pitrou 8988945cdc bpo-29861: release references to multiprocessing Pool tasks (#743)
* 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
2017-03-24 13:52:11 +01:00
Serhiy Storchaka bdf6b910f9 bpo-29776: Use decorator syntax for properties. (#585) 2017-03-19 08:40:32 +02:00
Antoine Pitrou ebb39bcc04 Issue #28779: multiprocessing.set_forkserver_preload() would crash the forkserver process if a preloaded module instantiated some multiprocessing objects such as locks. 2016-12-10 17:16:17 +01:00
Antoine Pitrou cd2a201e5b Issue #28779: multiprocessing.set_forkserver_preload() would crash the forkserver process if a preloaded module instantiated some multiprocessing objects such as locks. 2016-12-10 17:13:16 +01:00
Davin Potts 5458647bb8 Issue #28053: Applying refactorings, docs and other cleanup to follow. 2016-09-09 18:03:10 -05:00
Davin Potts 37156a70b9 Issue #21201: Improves readability of multiprocessing error message from server to client for certain exceptions 2016-09-08 14:40:36 -05:00
Davin Potts 70897ec54c Issue #21201: Improves readability of multiprocessing error message from server to client for certain exceptions 2016-09-08 14:47:23 -05:00
Davin Potts 86a7668426 Fixes issue #6766: Updated multiprocessing Proxy Objects to support nesting 2016-09-07 18:48:01 -05:00
Serhiy Storchaka b6a9c9761c Issue #26778: Fixed "a/an/and" typos in code comment, documentation and error
messages.
2016-04-17 09:39:28 +03:00
Serhiy Storchaka 6a7b3a77b4 Issue #26778: Fixed "a/an/and" typos in code comment and documentation. 2016-04-17 08:32:47 +03:00
Victor Stinner a6d865c128 Issue #25654:
* multiprocessing: open file with closefd=False to avoid ResourceWarning
* _test_multiprocessing: open file with O_EXCL to detect bugs in tests (if a
  previous test forgot to remove TESTFN)
* test_sys_exit(): remove TESTFN after each loop iteration

Initial patch written by Serhiy Storchaka.
2016-03-25 09:29:50 +01:00
Charles-François Natali 78f55ffc63 Issue #23992: multiprocessing: make MapResult not fail-fast upon exception. 2016-02-10 22:58:18 +00:00
Berker Peksag 16fb674882 Fix typo in docstring of multiprocessing.spawn.spawn_main() 2016-01-07 19:02:55 +02:00
Serhiy Storchaka 225821c653 Issue #25899: Converted non-ASCII characters in docstrings and manpage
to ASCII replacements.  Original patch by Chris Angelico.
2015-12-18 13:05:04 +02:00
Antoine Pitrou d5aec7ba48 Issue #21116: Avoid blowing memory when allocating a multiprocessing shared
array that's larger than 50% of the available RAM.

Patch by Médéric Boquien.
2015-04-13 20:53:43 +02:00
Serhiy Storchaka 2116b12da5 Issue #23865: close() methods in multiple modules now are idempotent and more
robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.
2015-04-10 13:29:28 +03:00
Serhiy Storchaka 7e7a3dba5f Issue #23865: close() methods in multiple modules now are idempotent and more
robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.
2015-04-10 13:24:41 +03:00
Berker Peksag 291d7b0284 Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not available.
Patch by Davin Potts.
2015-04-08 17:57:44 +03:00
Berker Peksag 7ecfc82edb Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not available.
Patch by Davin Potts.
2015-04-08 17:56:30 +03:00
Serhiy Storchaka 79fbeee237 Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now
handle exceptions raised by an iterator.  Patch by Alon Diamant and Davin
Potts.
2015-03-13 08:25:26 +02:00
Serhiy Storchaka 63623ac252 Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now
handle exceptions raised by an iterator.  Patch by Alon Diamant and Davin
Potts.
2015-03-13 08:30:33 +02:00
Steve Dower 4e02f8f4ae Issue #18382: Zero-length messages are consumed by ReadFile on Windows 8 and later 2015-03-02 08:06:30 -08:00
Steve Dower 3f9e381030 Issue #18382: Zero-length messages are consumed by ReadFile on Windows 8 and later 2015-03-02 08:05:27 -08:00
Charles-François Natali 6e6c59b508 Issue #23285: PEP 475 -- Retry system calls failing with EINTR. 2015-02-07 13:27:50 +00:00
Steve Dower 438f4abb50 Issue #23060: Suppresses a multiprocessing assert that fails incorrectly
This is to keep buildbots running while we figure out the best long-term fix.
2014-12-17 06:35:49 -08:00
Serhiy Storchaka b757c83ec6 Issue #22581: Use more "bytes-like object" throughout the docs and comments. 2014-12-05 22:25:22 +02:00
Serhiy Storchaka 92bf919ed0 Issue #22581: Use more "bytes-like object" throughout the docs and comments. 2014-12-05 22:26:10 +02:00
Antoine Pitrou 0b87831de9 Simplify code in multiprocessing.Connection.send_bytes().
Followup to issue #20540; patch by Serhiy.
2014-07-31 18:41:57 -04:00
Serhiy Storchaka 465e60e654 Issue #22033: Reprs of most Python implemened classes now contain actual
class name instead of hardcoded one.
2014-07-25 23:36:00 +03:00
Charles-François Natali 6e20460dc6 Issue #21566: Make use of socket.listen() default backlog. 2014-07-23 19:28:13 +01:00
Serhiy Storchaka fbc877b794 Fixed bugs in reprs of CookieJar and multiprocessing.dummy.Value. 2014-07-22 11:10:37 +03:00
Serhiy Storchaka 1392df96ef Fixed bugs in reprs of CookieJar and multiprocessing.dummy.Value. 2014-07-22 11:09:36 +03:00
Charles-François Natali a924fc7abc Issue #21565: multiprocessing: use contex-manager protocol for synchronization
primitives.
2014-05-25 14:12:12 +01:00
Benjamin Peterson 40470e00b5 do not generate pipe names in the temporary dir 2014-04-14 12:24:37 -04:00
Richard Oudkerk 99d8dd2489 Issue #20990: Correction for 619331c67638. 2014-03-23 18:44:11 +00:00
Richard Oudkerk c346060440 Merge 3.3. 2014-03-23 12:52:16 +00:00
Richard Oudkerk 3e952d56ea Issue #20633: Replace relative import by absolute import. 2014-03-23 12:42:28 +00:00
Richard Oudkerk 80a5be1d84 Issue #20980: Stop wrapping exception when using ThreadPool. 2014-03-23 12:30:54 +00:00
Richard Oudkerk a40675a1a2 Issue #20990: Fix issues found by pyflakes for multiprocessing. 2014-03-23 11:54:15 +00:00
Victor Stinner 7fa767e517 Issue #20976: pyflakes: Remove unused imports 2014-03-20 09:16:38 +01:00
Victor Stinner 69b1e261fc Issue #20978: pyflakes: fix undefined names 2014-03-20 08:50:52 +01:00
Antoine Pitrou b7d6d2ac6e Issue #20540: Fix a performance regression (vs. Python 3.2) when layering a multiprocessing Connection over a TCP socket.
For small payloads, Nagle's algorithm would introduce idle delays before the entire transmission of a message.
2014-02-08 23:03:56 +01:00
Antoine Pitrou 0c1e31ab1e Issue #20540: Fix a performance regression (vs. Python 3.2) when layering a multiprocessing Connection over a TCP socket.
For small payloads, Nagle's algorithm would introduce idle delays before the entire transmission of a message.
2014-02-08 23:05:52 +01:00
Nick Coghlan 9a76735b1d Close #19946: use runpy as needed in multiprocessing
- handles main files without a suffix
- handles main submodules properly
- adds test cases for the various kinds of __main__
2013-12-17 22:17:26 +10:00
Brett Cannon ca7ab7c7f1 Issue #19946: Raise ImportError when the main module cannot be found
by multiprocessing.spawn (before it was raising an AttributeError).
2013-12-13 11:43:10 -05:00
Eric Snow b523f8433a Implement PEP 451 (ModuleSpec). 2013-11-22 09:05:39 -07:00
Christian Heimes 634919a9fa Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC
module supports digestmod names, e.g. hmac.HMAC('sha1').
2013-11-20 17:23:06 +01:00
Richard Oudkerk 69cce482cb Merge. 2013-11-17 17:30:54 +00:00
Richard Oudkerk 8731d7b3c6 Fix handling of SystemExit and exit code. Patch by Brodie Rao. 2013-11-17 17:24:11 +00:00
Richard Oudkerk e943697750 Issue #19478: Make choice of semaphore prefix more flexible. 2013-11-02 17:05:07 +00:00
Richard Oudkerk e90cedb711 Issue #19425 -- a pickling error should not cause pool to hang. 2013-10-28 23:11:58 +00:00
Richard Oudkerk 33aaa73cad Merge. 2013-10-28 23:23:04 +00:00
Richard Oudkerk b1694cf588 Issue #18999: Make multiprocessing use context objects.
This allows different parts of a program to use different methods for
starting processes without interfering with each other.
2013-10-16 16:41:56 +01:00
Charles-François Natali 45e255167e Issue #18934: Use poll/select-based selectors for multiprocessing.Connection,
to avoid one extra FD per Connection.
2013-09-08 11:30:53 +02:00
Charles-François Natali e241ac9283 Issue #18934: multiprocessing: use selectors module. 2013-09-05 20:46:49 +02:00
Victor Stinner 67973c0279 Issue #18865: remove unused import from multiprocessing.util.spawnv_passfds() 2013-08-28 12:21:47 +02:00
Richard Oudkerk 0d097b6299 Issue #18865: PEP 446 makes multiprocessing.util.pipe() unnecessary. 2013-08-28 11:25:34 +01:00
Victor Stinner daf455554b Issue #18571: Implementation of the PEP 446: file descriptors and file handles
are now created non-inheritable; add functions os.get/set_inheritable(),
os.get/set_handle_inheritable() and socket.socket.get/set_inheritable().
2013-08-28 00:53:59 +02:00
Richard Oudkerk 7d2d43c0b1 Stop making fork server have copy of semaphore_tracker_fd. 2013-08-22 11:38:57 +01:00
Richard Oudkerk 0718f70131 Issue #18762: Fix EBADF error when using forkserver. 2013-08-22 11:38:55 +01:00
Richard Oudkerk a01fb39877 Issue #18762: Print debug info on failure to create new forkserver process.
Also modify test code to hopefully avoid deadlock on failure.
2013-08-21 19:45:19 +01:00
Ezio Melotti 30b9d5d3af #18705: fix a number of typos. Patch by Févry Thibault. 2013-08-17 15:50:46 +03:00
Richard Oudkerk 84ed9a68bd Issue #8713: Support alternative start methods in multiprocessing on Unix.
See http://hg.python.org/sandbox/sbt#spawn
2013-08-14 15:35:41 +01:00
Eli Bendersky 580373c469 Issue #18593: fix typo in comment 2013-07-30 06:13:01 -07:00
Eli Bendersky 25f043b152 Issue #18593: fix typo in comment 2013-07-30 06:12:49 -07:00
Brett Cannon cd171c8e92 Issue #18200: Back out usage of ModuleNotFoundError (8d28d44f3a9a) 2013-07-04 17:43:24 -04:00
Richard Oudkerk 1b6348e084 Issue #17261: Ensure multiprocessing's proxies use proper address. 2013-07-02 13:38:58 +01:00
Richard Oudkerk e3e8bcf3e7 Issue #17261: Ensure multiprocessing's proxies use proper address. 2013-07-02 13:37:43 +01:00
Richard Oudkerk 626032ac54 Issue #17097: Merge. 2013-07-01 19:10:39 +01:00
Richard Oudkerk cca8c53d6a Issue #17097: Make multiprocessing ignore EINTR. 2013-07-01 18:59:26 +01:00
Charles-François Natali 37cfb0a920 Issue #17914: Use os.cpu_count() instead of multiprocessing.cpu_count() where
applicable.
2013-06-28 19:25:45 +02:00
Brett Cannon 4f4088eb6f Issue #17177: Stop using imp in multiprocessing 2013-06-15 13:23:01 -04:00
Brett Cannon 0a140668fa Issue #18200: Update the stdlib (except tests) to use
ModuleNotFoundError.
2013-06-13 20:57:26 -04:00
Brett Cannon a33e11e436 Issue #17314: Stop using imp in multiprocessing.forking and move over
to importlib.
2013-06-07 11:45:41 -04:00
Charles-Francois Natali 44feda3cd0 Issue #17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on an
initial patch by Trent Nelson.
2013-05-20 14:40:46 +02:00
doko@ubuntu.com 94fd53ba4e - Fix typos in the multiprocessing module. 2013-05-15 18:08:03 +02:00
doko@ubuntu.com 9df891ca41 - Fix typos in the multiprocessing module. 2013-05-15 18:06:56 +02:00