[3.9] bpo-37193: remove thread objects which finished process its request (GH-13893) #23087
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…ythonGH-13893) * bpo-37193: remove the thread which finished process request from threads list * rename variable t to thread. * don't remove thread from list if it is daemon. * use lock to protect self._threads. * use finally block in case of exception from shutdown_request(). * check "not thread.daemon" before lock to avoid holding the lock if it's unnecessary. * fix the place of _threads_lock. * separate code to remove a current thread into a function. * check ValueError when removing thread. * fix wrong code which all instance shared same lock. * Extract thread management into a _Threads class to encapsulate atomic operations and separate concerns. * Replace multiple references of 'block_on_close' with one, avoiding the possibility that 'block_on_close' could change during the course of processing requests. Now, there's exactly one _threads object with behavior fixed for the duration. * Add docstrings to private classes. * Add test to ensure that a ThreadingTCPServer can be closed without serving any requests. * Use _NoThreads as the default value. Fixes AttributeError when server is closed without serving any requests. * Add blurb * Add test capturing failure. Co-authored-by: Jason R. Coombs <jaraco@jaraco.com> (cherry picked from commit c415590) Co-authored-by: MARUYAMA Norihiro <norihiro.maruyama@gmail.com>
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I reject the backport since it causes a regression on master: https://bugs.python.org/issue37193#msg380172 |
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bpo-37193: remove the thread which finished process request from threads list
rename variable t to thread.
don't remove thread from list if it is daemon.
use lock to protect self._threads.
use finally block in case of exception from shutdown_request().
check "not thread.daemon" before lock to avoid holding the lock if it's unnecessary.
fix the place of _threads_lock.
separate code to remove a current thread into a function.
check ValueError when removing thread.
fix wrong code which all instance shared same lock.
Extract thread management into a _Threads class to encapsulate atomic operations and separate concerns.
Replace multiple references of 'block_on_close' with one, avoiding the possibility that 'block_on_close' could change during the course of processing requests. Now, there's exactly one _threads object with behavior fixed for the duration.
Add docstrings to private classes.
Add test to ensure that a ThreadingTCPServer can be closed without serving any requests.
Use _NoThreads as the default value. Fixes AttributeError when server is closed without serving any requests.
Add blurb
Add test capturing failure.
Co-authored-by: Jason R. Coombs jaraco@jaraco.com
(cherry picked from commit c415590)
Co-authored-by: MARUYAMA Norihiro norihiro.maruyama@gmail.com
https://bugs.python.org/issue37193