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https://issues.apache.org/jira/browse/FLINK-36368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17903391#comment-17903391
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Arvid Heise commented on FLINK-36368:
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Merged into 1.19 as ba410bc80eaf08098a917ada1be8c34609de307d.
> Fix subtask management in CommittableCollector
> -----------------------------------------------
>
> Key: FLINK-36368
> URL: https://issues.apache.org/jira/browse/FLINK-36368
> Project: Flink
> Issue Type: Bug
> Reporter: Arvid Heise
> Assignee: Arvid Heise
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.20.1, 2.0-preview
>
>
> CommittableCollector is owned by a specific committer subtask and may handle
> a number of upstream tasks emitting committables.
> Currently, CommittableCollector rewrites the subtask id to its owner upon
> receiving a committable (summary). However, this makes it impossible to track
> if a specific upstream subtask has sent all committables or not.
> I propose to stop rewriting the subtask id while collecting the committables
> and instead rewrite them only on emission. This should also ease debugging
> the state.
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