[jira] [Commented] (KYLIN-4039) ZookeeperDistributedLock may not release lock when unlock operation was interrupted

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KYLIN-4039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16860570#comment-16860570 ] 

ASF GitHub Bot commented on KYLIN-4039:
---------------------------------------

ZhengshuaiPENG commented on pull request #681: KYLIN-4039, fix ZK distributed lock may not release lock when catchin…
URL: https://github.com/apache/kylin/pull/681
 
 
   …g interrupt exception
 
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> ZookeeperDistributedLock may not release lock when unlock operation was interrupted
> -----------------------------------------------------------------------------------
>
>                 Key: KYLIN-4039
>                 URL: https://issues.apache.org/jira/browse/KYLIN-4039
>             Project: Kylin
>          Issue Type: Bug
>            Reporter: PENG Zhengshuai
>            Priority: Major
>
> ZookeeperDistributedLock may hold the lock and not release it when the unlock operation was interrupted.
> Because the unlock operation contains two steps: 
> 1. peekLock: get the owner of the lock
> 2. purgeLock: purge the lock if the owner of the lock is the current client.
> If the peekLock step is interrupted, the purgeLock step won't be executed. Thus the lock won't be released.
> Meanwhile, the lock operation should also consider the interrupt cases.



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