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multiprocessing test_shared_memory_recreate is not concurrency-safe #95212

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tiran opened this issue Jul 24, 2022 · 1 comment
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multiprocessing test_shared_memory_recreate is not concurrency-safe #95212

tiran opened this issue Jul 24, 2022 · 1 comment
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@tiran
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3.10 bug and security fixes 3.11 bug and security fixes 3.12 new features, bug and security fixes tests Tests in the Lib/test dir triaged The issue has been accepted as valid by a triager. type-bug An unexpected behavior, bug, or error

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tiran commented Jul 24, 2022

Bug report

The test cases

  • test.test_multiprocessing_spawn.WithProcessesTestSharedMemory.test_shared_memory_recreate
  • test.test_multiprocessing_fork.WithProcessesTestSharedMemory.test_shared_memory_recreate
  • test.test_multiprocessing_forkserver.WithProcessesTestSharedMemory.test_shared_memory_recreate

are not concurrency-safe because they all use the same semaphore name. A left-over semaphore from a previous run can also cause problems The bug is currently causing several buildbots to break. The obvious solution is to use the _new_shm_name helper like the other tests.
@tiran tiran added type-bug An unexpected behavior, bug, or error tests Tests in the Lib/test dir 3.11 bug and security fixes 3.10 bug and security fixes 3.12 new features, bug and security fixes labels Jul 24, 2022
@tiran tiran self-assigned this Jul 24, 2022
tiran added a commit to tiran/cpython that referenced this issue Jul 24, 2022
@tiran
pythongh-95212: make multiprocessing test case parallel-safe
a443dee
@bedevere-bot bedevere-bot mentioned this issue Jul 24, 2022
Merged
tiran added a commit that referenced this issue Jul 25, 2022
@tiran
gh-95212: make multiprocessing test case parallel-safe (GH-95213)
5956de1
miss-islington pushed a commit to miss-islington/cpython that referenced this issue Jul 25, 2022
@tiran @miss-islington
pythongh-95212: make multiprocessing test case parallel-safe (pythonG…
a28f314 
…H-95213)

(cherry picked from commit 5956de1)

Co-authored-by: Christian Heimes <christian@python.org>
@bedevere-bot bedevere-bot mentioned this issue Jul 25, 2022
Merged
miss-islington pushed a commit to miss-islington/cpython that referenced this issue Jul 25, 2022
@tiran @miss-islington
pythongh-95212: make multiprocessing test case parallel-safe (pythonG…
5cc22a0 
…H-95213)

(cherry picked from commit 5956de1)

Co-authored-by: Christian Heimes <christian@python.org>
@bedevere-bot bedevere-bot mentioned this issue Jul 25, 2022
Merged
miss-islington added a commit that referenced this issue Jul 25, 2022
@miss-islington @tiran
gh-95212: make multiprocessing test case parallel-safe (GH-95213)
49d0384 
(cherry picked from commit 5956de1)

Co-authored-by: Christian Heimes <christian@python.org>
miss-islington added a commit that referenced this issue Jul 25, 2022
@miss-islington @tiran
gh-95212: make multiprocessing test case parallel-safe (GH-95213)
40f41ba 
(cherry picked from commit 5956de1)

Co-authored-by: Christian Heimes <christian@python.org>
@erlend-aasland erlend-aasland added the triaged The issue has been accepted as valid by a triager. label Jul 25, 2022
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tiran commented Jul 25, 2022

Problem is fixed in 3.10, 3.11, and main branch.

@tiran tiran closed this as completed Jul 25, 2022
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3.10 bug and security fixes 3.11 bug and security fixes 3.12 new features, bug and security fixes tests Tests in the Lib/test dir triaged The issue has been accepted as valid by a triager. type-bug An unexpected behavior, bug, or error
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