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https://issues.apache.org/jira/browse/BEAM-6077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16697197#comment-16697197
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Maximilian Michels commented on BEAM-6077:
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Correction: you need to use {{OperatorStateStore}} state which also provides a
State interface. If you look at {{ FlinkKafkaConsumerBase#snapshotState}} you
see an example of how that's being used.
> Make UnboundedSource state rescale friendly
> -------------------------------------------
>
> Key: BEAM-6077
> URL: https://issues.apache.org/jira/browse/BEAM-6077
> Project: Beam
> Issue Type: Improvement
> Components: runner-flink
> Affects Versions: 2.8.0
> Reporter: Jozef Vilcek
> Assignee: Jozef Vilcek
> Priority: Major
>
> FlinkRunner's UnboundedSourceWrapper currently does not rescale well it's
> state when job changes parallelism.
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