[jira] [Commented] (BEAM-11063) FlinkStateInternals assumes that null value for accumulator means that the accumulator was never created

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-11063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17294668#comment-17294668 ] 

Beam JIRA Bot commented on BEAM-11063:
--------------------------------------

This issue was marked "stale-P2" and has not received a public comment in 14 days. It is now automatically moved to P3. If you are still affected by it, you can comment and move it back to P2.

> FlinkStateInternals assumes that null value for accumulator means that the accumulator was never created
> --------------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-11063
>                 URL: https://issues.apache.org/jira/browse/BEAM-11063
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>            Reporter: Luke Cwik
>            Priority: P3
>
> FlinkStateInternals assumes that null value for accumulator means that the accumulator was never created. There are combiners which have non-null values returned by createAccumulator but null values after merging.
> It would be good to have a ValidatesRunner test that covers an accumulator with a null final value and non-null initial value.
> Code link:
> https://github.com/apache/beam/blob/v2.24.0/runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/state/FlinkStateInternals.java#L507



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