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https://issues.apache.org/jira/browse/FLINK-10346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16620239#comment-16620239
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Stephan Ewen commented on FLINK-10346:
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Concerning the directories: Why don't we delete the HA directory for a job
recursively when the job is finished/canceled? Then all these things should go
away.
> MemoryStateBackend does not clean up checkpoint directory
> ---------------------------------------------------------
>
> Key: FLINK-10346
> URL: https://issues.apache.org/jira/browse/FLINK-10346
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.5.3, 1.6.0, 1.7.0
> Reporter: Till Rohrmann
> Priority: Major
> Fix For: 1.7.0
>
>
> The {{StateBackendLoader}} creates a random subdirectory under
> {{HighAvailabilityOptions.HA_STORAGE_PATH}} for the {{MemoryStateBackend}} if
> no checkpointing directory has been specified (see
> {{StateBackendLoader.java:246}}). The problem is that this directory gets
> never removed after the {{MemoryStateBackend}} is closed. It is important to
> clean up these created directories.
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