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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11409) DatanodeInfo getNetworkLocation and setNetworkLocation shoud use volatile instead of synchronized
Date Tue, 14 Feb 2017 00:35:41 GMT
Chen Liang created HDFS-11409:
---------------------------------

             Summary: DatanodeInfo getNetworkLocation and setNetworkLocation shoud use volatile
instead of synchronized
                 Key: HDFS-11409
                 URL: https://issues.apache.org/jira/browse/HDFS-11409
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Chen Liang
            Assignee: Chen Liang
            Priority: Minor


{{DatanodeInfo}} has synchronized methods {{getNetworkLocation}} and {{setNetworkLocation}}.
While they doing nothing more than setting and getting variable {{location}}.

Since {{location}} is not being modified based on its current value and is independent from
any other variables. This JIRA propose to remove synchronized methods but only make {{location}}
volatile. Such that threads will not be blocked on get/setNetworkLocation.

Thanks  [~szetszwo] for the offline disscussion.



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