15957 2025-08-21 06:53:04 +0000 AB-INT: importlib deadlock issue on older python versions 2026-10-15 14:57:47 +0000 1 1 10 QA/Testing Functional (self) Testing oe-selftest unspecified x86 Multiple NEW https://bugzilla.yoctoproject.org/show_bug.cgi?id=16453 AB-INT Medium normal 6.1 1 mathieu.dubois-briand unassigned antonin.godard JPEWhacker randy.macleod richard.purdie yoann.congal --- --- No (bug/feature does not impact docs) oldest_to_newest 102633 0 mathieu.dubois-briand 2025-08-21 06:53:04 +0000 I'm not really sure how to understand this failure and what is the root cause here. First we have: 75 2025-08-17 01:29:52,082 - oe-selftest - INFO - testtools.testresult.real._StringException: Traceback (most recent call last): 76 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/core/case.py", line 40, in _oeSetUpClass 77 clss.setUpClassMethod() 78 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/selftest/cases/meta_ide.py", line 23, in setUpClass 79 bb_vars = get_bb_vars(['MACHINE_ARCH', 'TARGET_VENDOR', 'TARGET_OS', 'DEPLOY_DIR_IMAGE', 'COREBASE']) 80 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 250, in get_bb_vars 81 bbenv = get_bb_env(target, postconfig=postconfig) 82 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 246, in get_bb_env 83 return bitbake("-e", postconfig=postconfig).output 84 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 236, in bitbake 85 return runCmd(cmd, ignore_status, timeout, output_log=output_log, **options) 86 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 214, in runCmd 87 raise AssertionError("Command '%s' returned non-zero exit status %d:\n%s" % (command, result.status, exc_output)) 88 AssertionError: Command 'bitbake -e' returned non-zero exit status 1: 89 NOTE: Reconnecting to bitbake server... 90 ERROR: Unable to parse <frozen importlib._bootstrap> 91 Traceback (most recent call last): 92 File "<frozen importlib._bootstrap>", line 1024, in _find_and_load 93 File "<frozen importlib._bootstrap>", line 171, in __enter__ 94 File "<frozen importlib._bootstrap>", line 123, in acquire 95 KeyError: 140462603003456 But we also have this, later in the log: 105 Exception in thread Thread-13 (_run_test): 106 Traceback (most recent call last): 107 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/core/utils/concurrencytest.py", line 234, in _run_test 108 testserver.run(process_result) 109 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 1197, in run 110 protocol.lineReceived(line) 111 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 567, in lineReceived 112 self._state.lineReceived(line) 113 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 404, in lineReceived 114 self.details_parser.lineReceived(line) 115 File "/usr/lib/python3/dist-packages/subunit/details.py", line 42, in lineReceived 116 self._state.endDetails() 117 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 400, in endDetails 118 self.parser.client.stopTest(self.parser._current_test) 119 File "/usr/lib/python3/dist-packages/testtools/testresult/real.py", line 1537, in stopTest 120 return self.decorated.stopTest(test) 121 File "/usr/lib/python3/dist-packages/testtools/testresult/real.py", line 232, in stopTest 122 super().stopTest(test) 123 File "/usr/lib/python3.10/unittest/result.py", line 80, in stopTest 124 self._restoreStdout() 125 File "/usr/lib/python3.10/unittest/result.py", line 99, in _restoreStdout 126 self._stdout_buffer.seek(0) 127 AttributeError: 'NoneType' object has no attribute 'seek' 102636 1 mathieu.dubois-briand 2025-08-21 06:55:22 +0000 qemuarm64-tc ubuntu2204-vk-1 master completed at 2025-08-17 11:34:38+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/5/builds/2140/steps/12/logs/stdio 102646 2 randy.macleod 2025-08-21 14:44:16 +0000 Richard thinks that this is a python bug in ubu-22.04 that has been fixed in newer versions of python. Monitor for now, The main error is the KeyError 105232 3 randy.macleod 2026-04-23 15:17:34 +0000 Has't happen. Might be fixed by weekly builder distro updates. 105668 4 JPEWhacker 2026-05-28 19:50:03 +0000 This was seen again in https://bugzilla.yoctoproject.org/show_bug.cgi?id=16296 (which is now closed as a duplicate of this bug). 105670 5 JPEWhacker 2026-05-28 19:50:56 +0000 *** Bug 16296 has been marked as a duplicate of this bug. *** 106052 6 yoann.congal 2026-06-30 21:33:26 +0000 oe-selftest-debian debian11-vk-1 scarthgap completed at 2026-06-30 18:59:51+00:00 https://autobuilder.yoctoproject.org/valkyrie/?#/builders/35/builds/4176 $ ssh debian11-vk-1.yocto.io python3 --version Python 3.9.2 I think the upstream bug is "importlib lock race issue in deadlock handling code" · Issue #91351 · python/cpython https://github.com/python/cpython/issues/91351 => Linked PR: gh-91351: Fix some bugs in importlib handling of re-entrant imports by exarkun · Pull Request #94504 · python/cpython https://github.com/python/cpython/pull/94504 => Merge commit: gh-91351: Fix some bugs in importlib handling of re-entrant imports (… · python/cpython@3325f05 https://github.com/python/cpython/commit/3325f054e33b318aa56b74472f76a56b8afc0510 => in python >= 3.12 Note: I've created #16335 "Create more fine-grained buildtools", with the idea of creating a buildtool-python3 to install a fixed python where host python3 has this bug. 106053 7 yoann.congal 2026-06-30 21:39:19 +0000 Looking through https://errors.yoctoproject.org/Errors/Search/?query=frozen+importlib._bootstrap, I found others instances: oe-selftest-fedora stream9-vk-1 scarthgap completed at 2026-06-24 13:17:33+00:00 https://autobuilder.yoctoproject.org/valkyrie/?#/builders/48/builds/3965/steps/15/logs/stdio oe-selftest-debian ubuntu2204-vk-1 scarthgap completed at 2026-04-07 00:36:39+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/35/builds/3612/steps/15/logs/stdio oe-selftest-debian debian11-vk-1 whinlatter completed at 2026-03-29 11:53:50+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/35/builds/3545/steps/15/logs/stdio Note: the link to this bug is not easy to notice because the reported error appears later and is not always the same.