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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7213) processIncrementalBlockReport performance degradation
Date Wed, 08 Oct 2014 19:44:33 GMT
Daryn Sharp created HDFS-7213:
---------------------------------

             Summary: 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


{{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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