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https://issues.apache.org/jira/browse/HDFS-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15111866#comment-15111866
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Aaron T. Myers commented on HDFS-4478:
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[~daryn] - is this perhaps a duplicate of HDFS-5029?
> Token operations should not lock namespace
> ------------------------------------------
>
> Key: HDFS-4478
> URL: https://issues.apache.org/jira/browse/HDFS-4478
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
>
> Token get/renew/cancel operations obtain a write lock on the namespace. This
> seems unnecessary.
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