[GitHub] [beam] robinyqiu commented on a change in pull request #12993: [BEAM-10991] Cherrypick #12980 to 2.25.0: Revert "[BEAM-8543] Dataflow streaming timers are not strictly time ordered when set earlier mid-bundle (#11924)"

[GitBox <gi...@apache.org>]

robinyqiu commented on a change in pull request #12993:
URL: https://github.com/apache/beam/pull/12993#discussion_r499754509



##########
File path: CHANGES.md
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@@ -131,6 +132,9 @@
   --temp_location, or pass method="STREAMING_INSERTS" to WriteToBigQuery ([BEAM-6928](https://issues.apache.org/jira/browse/BEAM-6928)).
 * Python SDK now understands `typing.FrozenSet` type hints, which are not interchangeable with `typing.Set`. You may need to update your pipelines if type checking fails. ([BEAM-10197](https://issues.apache.org/jira/browse/BEAM-10197))
 
+## Known issues
+
+* When a timer fires but is reset prior to being executed, a watermark hold may be leaked, causing a stuck pipeline [BEAM-10991](https://issues.apache.org/jira/browse/BEAM-10991).
 

Review comment:
       Are we missing one line here?
   
   In https://github.com/apache/beam/pull/12997 we have
   `Dataflow streaming timers are not strictly time ordered when set earlier mid-bundle ([BEAM-8543](https://issues.apache.org/jira/browse/BEAM-8543)).`




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