Add another test for a possible deadlock scenario caused by #8703

[hendrikmakait]

Addendum to #8703 adding a test for another deadlock scenario.

• Tests added / passed
• Passes pre-commit run --all-files

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    29 files  +     8      29 suites  +8   11h 57m 37s ⏱️ + 4h 30m 44s
 4 087 tests +     5   3 971 ✅ +    10    112 💤  -   2  4 ❌  - 3 
55 286 runs  +16 183  52 844 ✅ +15 394  2 437 💤 +792  5 ❌  - 3 

For more details on these failures, see this check.

Results for commit ac2c5f5. ± Comparison against base commit 48eefee.

This pull request removes 1 and adds 6 tests. Note that renamed tests count towards both.

distributed.tests.test_scheduler ‑ test_deadlock_dependency_of_queued_released

distributed.tests.test_client ‑ test_release_persisted_collection
distributed.tests.test_client ‑ test_release_persisted_collection_sync
distributed.tests.test_scheduler ‑ test_deadlock_dependency_of_queued_released_when_worker_removed[False]
distributed.tests.test_scheduler ‑ test_deadlock_dependency_of_queued_released_when_worker_removed[True]
distributed.tests.test_scheduler ‑ test_deadlock_dependency_of_queued_released_when_worker_replaced[False]
distributed.tests.test_scheduler ‑ test_deadlock_dependency_of_queued_released_when_worker_replaced[True]

♻️ This comment has been updated with latest results.

[fjetter]

This test is a little ambiguous. This could either mean that B computed the result or that it fetched it. Both will take different code paths.

This is a likely source for a flaky test that'll be hard to track down

[hendrikmakait]

Uff, I was already wondering why this test failed on some CI runs but never locally!

[fjetter]

nit/hint: In tests I often use dep.release() which is pretty much the same but you have access to the key later on. Also, in case there is some reference to this it will still be released.

This is style, feel free to ignore

[hendrikmakait]

Ah, good point, I didn't think of this!