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https://issues.apache.org/jira/browse/BEAM-1393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15862290#comment-15862290
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Jingsong Lee commented on BEAM-1393:
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Totally agree!
{{AbstractStreamOperator}} will check the type of {{this}} and invoke
{{checkpointKeyGroup}} in {{snapshotState()}}. ({{initializeState}} is similar)
Looking forward to contributing back to Flink.
I think we do not need store {{pushedBackWatermark}} in state anymore. We can
maintain it in memory and restore it by traversing pushed-back events.
> Update Flink Runner to Flink 1.2.0
> ----------------------------------
>
> Key: BEAM-1393
> URL: https://issues.apache.org/jira/browse/BEAM-1393
> Project: Beam
> Issue Type: Improvement
> Components: runner-flink
> Reporter: Aljoscha Krettek
> Assignee: Jingsong Lee
>
> When we update to 1.2.0 we can use the new internal Timer API that is
> available to Flink operators: {{InternalTimerService}} and also use broadcast
> state to store side-input data.
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