Janek Bevendorff created BEAM-14080:
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Summary: Portable runner does not return job exit status to client
after long-running job
Key: BEAM-14080
URL: https://issues.apache.org/jira/browse/BEAM-14080
Project: Beam
Issue Type: Bug
Components: sdk-py-harness
Affects Versions: 2.36.0
Reporter: Janek Bevendorff
I submit Python Beam jobs to our Flink cluster with the PortableRunner through
a remote job server. If a job finishes within a few seconds or minutes, the
return status (including a dump of any Python exceptions in case there was an
error) is returned to the client upon completion.
If the job, however, runs for longer (say) hours, then the client and job
server seem to lose connection. This results in the client hanging forever
until I press Ctrl+C to terminate it, even long after the actual job has
completed (which has no effect whatsoever on the actual job).
Example pseudo job:
{code:java}
print('Job started')
with beam.Pipeline() as pipeline:
pipeline | DoSomething()
print('Job finished'){code}
If the pipeline finishes quickly, it looks like this from the client's
perspective:
{code:java}
$ python3 myjob.py
Job started
Job finished
${code}
If the job runs for longer, then the {{with}} statement never finishes and I
have to abort the Python script with Ctrl+C:
{code:java}
$ python3 myjob.py
Job started
^C
${code}
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