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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7213) processIncrementalBlockReport performance degradation
Date Wed, 29 Oct 2014 14:20:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188382#comment-14188382
] 

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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