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https://issues.apache.org/jira/browse/FLINK-5660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15839924#comment-15839924
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Till Rohrmann commented on FLINK-5660:
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Yes I also thought that this problem felt familiar. Maybe we forgot to port the
fix to the master back in the days.
> Not properly cleaning PendingCheckpoints up
> -------------------------------------------
>
> Key: FLINK-5660
> URL: https://issues.apache.org/jira/browse/FLINK-5660
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.2.0, 1.3.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Fix For: 1.3.0, 1.2.1
>
>
> When cleaning up a {{PendingCheckpoint}}, then it sometimes happens that not
> all state handles are properly discarded. The reason is that the discard
> operation is executed asynchronously but the synchronous {{discard}} call
> already cleans the task state collection.
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