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https://issues.apache.org/jira/browse/HDFS-5681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daryn Sharp updated HDFS-5681:
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Status: Patch Available (was: Open)
> renewLease should not hold fsn write lock
> -----------------------------------------
>
> Key: HDFS-5681
> URL: https://issues.apache.org/jira/browse/HDFS-5681
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-5681.patch
>
>
> Lease renewals unnecessarily hold the write lock which reduces throughput.
> Currently the fsn lock doubles as an "operational lock" to prevent state
> transitions. If the lease manager is thread-safe then a read lock is
> sufficient.
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