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https://issues.apache.org/jira/browse/HDFS-7213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14697136#comment-14697136
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Hudson commented on HDFS-7213:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #276 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/276/])
HDFS-7213. processIncrementalBlockReport performance degradation. Contributed
by Eric Payne. (vinayakumarb: rev d25cb8fe12d00faf3e8f3bfd23fd1b01981a340f)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> 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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