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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3280) DFSOutputStream.sync should not be synchronized
Date Sat, 14 Apr 2012 02:33:17 GMT
DFSOutputStream.sync should not be synchronized

                 Key: HDFS-3280
                 URL: https://issues.apache.org/jira/browse/HDFS-3280
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs client
    Affects Versions: 2.0.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Critical

HDFS-895 added an optimization to make hflush() much faster by unsynchronizing it. But, we
forgot to un-synchronize the deprecated {{sync()}} wrapper method. This makes the HBase WAL
really slow on 0.23+ since it doesn't take advantage of HDFS-895 anymore.

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