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https://issues.apache.org/jira/browse/FLINK-20030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arvid Heise resolved FLINK-20030.
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Resolution: Fixed
> Barrier announcement causes outdated RemoteInputChannel#numBuffersOvertaken
> ---------------------------------------------------------------------------
>
> Key: FLINK-20030
> URL: https://issues.apache.org/jira/browse/FLINK-20030
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing, Runtime / Network
> Affects Versions: 1.12.0
> Reporter: Arvid Heise
> Assignee: Roman Khachatryan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.12.0
>
>
> {{numBuffersOvertaken}} is set when the announcement is enqueued, but it can
> take quite a while until the checkpoint is actually started with quite a
> non-priority buffers being drained.
> We should move away from {{numBuffersOvertaken}} and use sequence numbers.
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