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test_subprocess: test_pipesize_default() failed on s390x Fedora Clang 3.x buildbot #110184

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test_subprocess: test_pipesize_default() failed on s390x Fedora Clang 3.x buildbot#110184
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testsTests in the Lib/test dir

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@vstinner
vstinner
opened on Oct 1, 2023

s390x Fedora Clang 3.x buildbot:

FAIL: test_pipesize_default (test.test_subprocess.ProcessTestCase.test_pipesize_default)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang/build/Lib/test/test_subprocess.py", line 763, in test_pipesize_default
    self.assertEqual(
AssertionError: 65536 != 8192

build: https://buildbot.python.org/all/#/builders/3/builds/4728

Linked PRs

Activity

  1. vstinner
    added
    testsTests in the Lib/test dir
    on Oct 1, 2023

  2. vstinner commented on Oct 5, 2023

    @vstinner
    vstinner
    on Oct 5, 2023
    MemberAuthor

    New fail on s390x Fedora Refleaks 3.x: https://buildbot.python.org/all/#/builders/433/builds/902

  3. vstinner
    added 2 commits that reference this issue on Oct 6, 2023

    pythongh-110184: Fix subprocess test_pipesize_default()

    f08aa06

    gh-110184: Fix subprocess test_pipesize_default() (#110465)

    d023d41
  4. miss-islington
    added 2 commits that reference this issue on Oct 6, 2023

    pythongh-110184: Fix subprocess test_pipesize_default() (pythonGH-110465

    3257f00

    pythongh-110184: Fix subprocess test_pipesize_default() (pythonGH-110465

    f6c2512
  5. vstinner
    closed this as completedon Oct 6, 2023
  6. vstinner
    added 2 commits that reference this issue on Oct 6, 2023

    [3.12] gh-110184: Fix subprocess test_pipesize_default() (GH-110465) (#…

    7e07eca

    [3.11] gh-110184: Fix subprocess test_pipesize_default() (GH-110465) (#…

    49a45f6

  7. vstinner commented on Oct 7, 2023

    @vstinner
    vstinner
    on Oct 7, 2023
    MemberAuthor

    Oh. It seems like the test failed again when PR gh-110441 got merged: https://buildbot.python.org/all/#/builders/531/builds/4639 It's surprising since the test passed before.

    0:03:25 load avg: 2.45 Re-running 1 failed tests in verbose mode in subprocesses
0:03:25 load avg: 2.45 Run 1 test in parallel using 1 worker process (timeout: 20 min, worker timeout: 25 min)
0:03:25 load avg: 2.45 [1/1/1] test_subprocess failed (2 errors, 2 failures)
Re-running test_subprocess in verbose mode (matching: test_pipesizes, test_pipesize_default)
test_pipesize_default (test.test_subprocess.ProcessTestCase.test_pipesize_default) ... FAIL
test_pipesizes (test.test_subprocess.ProcessTestCase.test_pipesizes) ... ERROR
test_pipesize_default (test.test_subprocess.ProcessTestCaseNoPoll.test_pipesize_default) ... FAIL
test_pipesizes (test.test_subprocess.ProcessTestCaseNoPoll.test_pipesizes) ... ERROR

======================================================================
ERROR: test_pipesizes (test.test_subprocess.ProcessTestCase.test_pipesizes)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/test/test_subprocess.py", line 727, in test_pipesizes
    p = subprocess.Popen(
        ^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/subprocess.py", line 992, in __init__
    errread, errwrite) = self._get_handles(stdin, stdout, stderr)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/subprocess.py", line 1731, in _get_handles
    fcntl.fcntl(errwrite, fcntl.F_SETPIPE_SZ, self.pipesize)
PermissionError: [Errno 1] Operation not permitted

======================================================================
ERROR: test_pipesizes (test.test_subprocess.ProcessTestCaseNoPoll.test_pipesizes)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/test/test_subprocess.py", line 727, in test_pipesizes
    p = subprocess.Popen(
        ^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/subprocess.py", line 992, in __init__
    errread, errwrite) = self._get_handles(stdin, stdout, stderr)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/subprocess.py", line 1731, in _get_handles
    fcntl.fcntl(errwrite, fcntl.F_SETPIPE_SZ, self.pipesize)
PermissionError: [Errno 1] Operation not permitted

======================================================================
FAIL: test_pipesize_default (test.test_subprocess.ProcessTestCase.test_pipesize_default)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/test/test_subprocess.py", line 769, in test_pipesize_default
    self.assertEqual(
AssertionError: 65536 != 8192

======================================================================
FAIL: test_pipesize_default (test.test_subprocess.ProcessTestCaseNoPoll.test_pipesize_default)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/test/test_subprocess.py", line 769, in test_pipesize_default
    self.assertEqual(
AssertionError: 65536 != 8192

----------------------------------------------------------------------
Ran 4 tests in 0.013s

FAILED (failures=2, errors=2)
test test_subprocess failed
1 test failed again:
    test_subprocess

== Tests result: FAILURE then FAILURE ==
  8. vstinner
    reopened this on Oct 7, 2023

  9. vstinner commented on Oct 13, 2023

    @vstinner
    vstinner
    on Oct 13, 2023
    MemberAuthor
      File "/home/dje/cpython-buildarea/3.x.edelsohn-fedora-z.clang-installed/build/target/lib/python3.13/subprocess.py", line 1731, in _get_handles
    fcntl.fcntl(errwrite, fcntl.F_SETPIPE_SZ, self.pipesize)
PermissionError: [Errno 1] Operation not permitted

    The manual page says: https://man7.org/linux/man-pages/man2/fcntl.2.html

    An unprivileged process can adjust the
    pipe capacity to any value between the system page size
    and the limit defined in /proc/sys/fs/pipe-max-size (see
    proc(5)).

    and:

    Attempts by an unprivileged process to set the pipe
    capacity above the limit in /proc/sys/fs/pipe-max-size
    yield the error EPERM

  10. vstinner commented on Nov 8, 2023

    @vstinner
    vstinner
    on Nov 8, 2023
    MemberAuthor

    I didn't see the failure failure recently on s390x Fedora Clang 3.x, so I close the issue.

  11. vstinner
    closed this as completedon Nov 8, 2023
  12. Glyphack
    added a commit that references this issue on Sep 2, 2024

    pythongh-110184: Fix subprocess test_pipesize_default() (python#110465)

    99f0a64
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