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https://issues.apache.org/jira/browse/HIVE-14925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15570022#comment-15570022
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Pengcheng Xiong commented on HIVE-14925:
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that is fast... i was planning to do this today... Could u create a RB for it? 
Thanks.

> MSCK repair table hang while running with multi threading enabled
> -----------------------------------------------------------------
>
>                 Key: HIVE-14925
>                 URL: https://issues.apache.org/jira/browse/HIVE-14925
>             Project: Hive
>          Issue Type: Bug
>          Components: CLI
>    Affects Versions: 2.2.0
>            Reporter: Ratheesh Kamoor
>            Assignee: Pengcheng Xiong
>            Priority: Critical
>             Fix For: 2.2.0
>
>         Attachments: HIVE-14925.patch
>
>
> MSCK REPAIR TABLE hanging while running with multi-threading enabled 
> (default). I think it is because of a major design flaw in how thread pool 
> implemented in HiveMetaSoreChecker class / checkPartitionDirs method. This 
> method has a thread pool which register Callable but callable makes a 
> recursive call to checkPartitionDirs method again. This code will hang when 
> number of directories is more than thread pool size. 



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