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https://issues.apache.org/jira/browse/FLINK-38433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zakelly Lan resolved FLINK-38433.
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Fix Version/s: 2.2.0
Resolution: Fixed
> Avoid delete ForSt's directory when there happened to be an existing one
> ------------------------------------------------------------------------
>
> Key: FLINK-38433
> URL: https://issues.apache.org/jira/browse/FLINK-38433
> Project: Flink
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1.0
> Reporter: Zakelly Lan
> Assignee: Han Yin
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.2.0
>
>
> Currently, ForSt State backend will create the working directory, if there
> exists one with same name the directory will be cleared. The name contains
> jobid, vertexid, task_index, parallelism and attempt. In JM failover
> scenario, this would be a collision as the attempt number restart from 0,
> resulting in checkpoint broken.
>
> We should remove the clear existing directory logic.
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