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https://issues.apache.org/jira/browse/HDFS-3981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13465046#comment-13465046
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Xiaobo Peng commented on HDFS-3981:
-----------------------------------
Thank you, Konstantin. I will follow your suggestions and create a patch for
0.23.4
> access time is set without holding writelock in FSNamesystem
> ------------------------------------------------------------
>
> Key: HDFS-3981
> URL: https://issues.apache.org/jira/browse/HDFS-3981
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.23.3
> Reporter: Xiaobo Peng
> Assignee: Xiaobo Peng
> Priority: Minor
>
> Incorrect condition in {{FSNamesystem.getBlockLocatoins()}} can lead to
> updating times without write lock. In most cases this condition will force
> {{FSNamesystem.getBlockLocatoins()}} to hold write lock, even if times do not
> need to be updated.
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