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* bpo-31783: Fix a race condition while creating workers during interpreter shutdown
* 📜🤖 Added by blurb_it.
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Turn deprecation warnings added in 3.8 into TypeError.
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thread (#6375)
* Fixes issue 24882
* Add news file entry for change.
* Change test_concurrent_futures.ThreadPoolShutdownTest
Adjust the shutdown test so that, after submitting three jobs
to the executor, the test checks for less than three threads,
instead of looking for exactly three threads.
If idle threads are being recycled properly, then we should have
less than three threads.
* Switched idle count to semaphor, Updated tests
As suggested by reviewer tomMoral, swapped lock-protected counter
with a semaphore to track the number of unused threads.
Adjusted test_threads_terminate to wait for completiton of the
previous future before submitting a new one (and checking the
number of threads used).
Also added a new test to confirm the thread pool can be saturated.
* Updates tests as requested by pitrou.
* Correct minor whitespace error.
* Make test_saturation faster
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Deprecated passing the following arguments as keyword arguments:
- "func" in functools.partialmethod(), weakref.finalize(),
profile.Profile.runcall(), cProfile.Profile.runcall(),
bdb.Bdb.runcall(), trace.Trace.runfunc() and
curses.wrapper().
- "function" in unittest.addModuleCleanup() and
unittest.TestCase.addCleanup().
- "fn" in the submit() method of concurrent.futures.ThreadPoolExecutor
and concurrent.futures.ProcessPoolExecutor.
- "callback" in contextlib.ExitStack.callback(),
contextlib.AsyncExitStack.callback() and
contextlib.AsyncExitStack.push_async_callback().
- "c" and "typeid" in the create() method of multiprocessing.managers.Server
and multiprocessing.managers.SharedMemoryServer.
- "obj" in weakref.finalize().
Also allowed to pass arbitrary keyword arguments (even "self" and "func")
if the above arguments are passed as positional argument.
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(GH-10284)
Two kind of mistakes:
1. Missed space. After concatenating there is no space between words.
2. Missed comma. Causes unintentional concatenating in a list of strings.
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interpreter exit (GH-6144)
Executors in concurrent.futures accepted tasks after executor was shutdown by interpreter exit. Tasks were left in PENDING state forever. This fix changes submit to instead raise a RuntimeError.
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Where a queue may be invoked from a weakref callback, we need
to use the reentrant SimpleQueue.
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* bpo-21423: Add an initializer argument to {Process,Thread}PoolExecutor
* Fix docstring
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* bpo-31249: Fix ref cycle in ThreadPoolExecutor
concurrent.futures: WorkItem.run() used by ThreadPoolExecutor now
breaks a reference cycle between an exception object and the WorkItem
object. ThreadPoolExecutor.shutdown() now also clears its threads
set.
* shutdown() now only clears threads if wait is true.
* Revert changes on shutdown()
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bpo-29212: Fix the ugly ThreadPoolExecutor thread name.
Fixes the newly introduced ugly default thread name for concurrent.futures
thread.ThreadPoolExecutor threads. They'll now resemble the old <=3.5
threading default Thread-x names by being named ThreadPoolExecutor-y_n.
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the ability to specify a thread name prefix.
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Popa.)
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concurrent.futures ThreadPoolExecutor.
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cannot raise queue.Empty).
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concurrent.futures.
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