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https://issues.apache.org/jira/browse/HDFS-7213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinayakumar B updated HDFS-7213:
--------------------------------
    Fix Version/s: 2.7.0

> processIncrementalBlockReport performance degradation
> -----------------------------------------------------
>
>                 Key: HDFS-7213
>                 URL: https://issues.apache.org/jira/browse/HDFS-7213
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.4.0
>            Reporter: Daryn Sharp
>            Assignee: Eric Payne
>            Priority: Critical
>             Fix For: 2.7.0, 2.6.1
>
>         Attachments: HDFS-7213.1412804753, HDFS-7213.1412806496.txt
>
>
> {{BlockManager#processIncrementalBlockReport}} has a debug line that is 
> missing a {{isDebugEnabled}} check.  The write lock is being held.  Coupled 
> with the increase in incremental block reports from receiving blocks, under 
> heavy load this log line noticeably degrades performance.



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