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test_subprocess: test_pipesize_default() failed on s390x Fedora Clang 3.x buildbot #110184
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New fail on s390x Fedora Refleaks 3.x: https://buildbot.python.org/all/#/builders/433/builds/902
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 ==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 permittedThe 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 EPERMI didn't see the failure failure recently on s390x Fedora Clang 3.x, so I close the issue.
s390x Fedora Clang 3.x buildbot:
build: https://buildbot.python.org/all/#/builders/3/builds/4728
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