Steve Niemitz created BEAM-10991:
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Summary: Timers don't release watermark holds in dataflow on 2.24
Key: BEAM-10991
URL: https://issues.apache.org/jira/browse/BEAM-10991
Project: Beam
Issue Type: Bug
Components: runner-dataflow
Affects Versions: 2.24.0
Reporter: Steve Niemitz
We have multiple streaming pipelines (using state + timers) that, after
upgrading to 2.24, exhibited very strange watermark behavior. The watermark on
some stateful DoFns would advance to the end of the first window, and then get
stuck there forever, even preventing the job from draining.
I was able to track the problem down to
[https://github.com/apache/beam/commit/88acc5267f759d81e9836a9db17b9e0ee521c785.]
After revering it, the behavior went back to normal. It looks like its
possible in that commit that watermark holds for some timers aren't being
cleared.
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