gh-109917: Fix test instability in test_concurrent_futures (GH-110306)
The test had an instability issue due to the ordering of the dummy
queue operation and the real wakeup pipe operations. Both primitives
are thread safe but not done atomically as a single update and may
interleave arbitrarily. With the old order of operations this can lead
to an incorrect state where the dummy queue is full but the wakeup
pipe is empty. By swapping the order in clear() I think this can no
longer happen in any possible operation interleaving (famous last
words).
(cherry picked from commit a376a72bd9)
Co-authored-by: elfstrom <elfstrom@users.noreply.github.com>
gh-109594: Fix concurrent.futures test_timeout() (GH-110018)
Fix test_timeout() of test_concurrent_futures.test_wait. Remove the
future which may or may not complete depending if it takes longer
than the timeout ot not. Keep the second future which does not
complete before wait(). Make also the test faster: 0.5 second instead
of 6 seconds, so remove @support.requires_resource('walltime')
decorator.
(cherry picked from commit 9be283e5e1)
Co-authored-by: Victor Stinner <vstinner@python.org>
gh-109832: concurrent.futures test_deadlock restores sys.stderr (GH-109887)
test_error_at_task_unpickle() and
test_error_during_result_unpickle_in_result_handler() now restore
sys.stderr which is overriden by _raise_error_ignore_stderr().
(cherry picked from commit 2897142d2e)
Co-authored-by: Victor Stinner <vstinner@python.org>
gh-109702: Increase concurrent_futures deadlock timeout (GH-109703)
Replace SHORT_TIMEOUT with LONG_TIMEOUT in test_deadlock of
test_concurrent_futures.
(cherry picked from commit 1eb1b45183)
Co-authored-by: Victor Stinner <vstinner@python.org>
* gh-108388: Convert test_concurrent_futures to package (#108401)
Convert test_concurrent_futures to a package of sub-tests.
(cherry picked from commit aa6f787faa)
Notes on backport to 3.11:
* AsCompletedTests: Revert test_future_times_out() => test_zero_timeout()
* Restore TODO comment
* ThreadPoolExecutorTest.test_hang_global_shutdown_lock():
add @support.requires_resource('cpu').
Victor Stinner