[jira] [Commented] (FLINK-38433) Avoid delete ForSt's directory when there happened to be an existing one

["Zakelly Lan (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-38433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023470#comment-18023470 ] 

Zakelly Lan commented on FLINK-38433:
-------------------------------------

Merge a644a82 into master

> 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
>
> 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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