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https://issues.apache.org/jira/browse/HDFS-14731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17046080#comment-17046080
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Konstantin Shvachko commented on HDFS-14731:
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It's been a few days, I don't see any failures on Jenkins due to this.
Will commit to other 3.* branches if there are no objections. Should be an easy
merge.
> [FGL] Remove redundant locking on NameNode.
> -------------------------------------------
>
> Key: HDFS-14731
> URL: https://issues.apache.org/jira/browse/HDFS-14731
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Priority: Major
> Attachments: HDFS-14731.001.patch
>
>
> Currently NameNode has two global locks: FSNamesystemLock and
> FSDirectoryLock. An analysis shows that single FSNamesystemLock is sufficient
> to guarantee consistency of the NameNode state. FSDirectoryLock can be
> removed.
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