shunping opened a new pull request, #38423:
URL: https://github.com/apache/beam/pull/38423
The following error occurs in the python test workflows from time to time.
It happens during the shutdown of a job server, but looking at the code path,
it could be a problem in other servers like expansion service.
```
Exception ignored in atexit callback <bound method StopOnExitJobServer.stop
of <apache_beam.runners.portability.job_server.StopOnExitJobServer object at
0x7c8f2326c590>>:
Traceback (most recent call last):
File
"/runner/_work/beam/beam/sdks/python/test-suites/tox/py313/build/srcs/sdks/python/target/.tox-py313/py313/lib/python3.13/site-packages/apache_beam/runners/portability/job_server.py",
line 97, in stop
self._job_server.stop()
File
"/runner/_work/beam/beam/sdks/python/test-suites/tox/py313/build/srcs/sdks/python/target/.tox-py313/py313/lib/python3.13/site-packages/apache_beam/runners/portability/job_server.py",
line 127, in stop
return self._server.stop()
File
"/runner/_work/beam/beam/sdks/python/test-suites/tox/py313/build/srcs/sdks/python/target/.tox-py313/py313/lib/python3.13/site-packages/apache_beam/utils/subprocess_server.py",
line 255, in stop
self.stop_process()
File
"/runner/_work/beam/beam/sdks/python/test-suites/tox/py313/build/srcs/sdks/python/target/.tox-py313/py313/lib/python3.13/site-packages/apache_beam/utils/subprocess_server.py",
line 259, in stop_process
self._cache.purge(self._owner_id)
File
"/runner/_work/beam/beam/sdks/python/test-suites/tox/py313/build/srcs/sdks/python/target/.tox-py313/py313/lib/python3.13/site-packages/apache_beam/utils/subprocess_server.py",
line 93, in purge
raise ValueError(f"{owner} not in {self._live_owners}")
ValueError: 10 not in set()
```
We identified three potential issues and implemented fixes to harden the
server shutdown process.
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