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https://issues.apache.org/jira/browse/HDFS-7213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188382#comment-14188382
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Hudson commented on HDFS-7213:
------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #1916 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1916/])
HDFS-7213. processIncrementalBlockReport performance degradation. (kihwal: rev
e226b5b40d716b6d363c43a8783766b72734e347)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
> 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
>
> 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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