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https://issues.apache.org/jira/browse/HDFS-5372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE updated HDFS-5372:
-----------------------------------------

    Hadoop Flags: Reviewed

+1 patch looks good.

(Has to go. Will commit this later.  Or anyone could help?)

> In FSNamesystem, hasReadLock() returns false if the current thread holds the 
> write lock
> ---------------------------------------------------------------------------------------
>
>                 Key: HDFS-5372
>                 URL: https://issues.apache.org/jira/browse/HDFS-5372
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 3.0.0, 2.2.0
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Vinay
>         Attachments: HDFS-5372.patch
>
>
> This bug was discovered by [~vinayrpet] in [this 
> comment|https://issues.apache.org/jira/browse/HDFS-5283?focusedCommentId=13796752&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13796752].
> In FSNamesystem, there are hasReadLock() and hasReadOrWriteLock().  However, 
> when a thread holds the write lock, the read lock is not required for reading 
> data.  So hasReadLock() and hasReadOrWriteLock() actually are the same.



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