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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10682) Add metric to measure lock held time in FSDataSetImpl
Date Fri, 22 Jul 2016 22:59:20 GMT
Chen Liang created HDFS-10682:
---------------------------------

             Summary: Add metric to measure lock held time in FSDataSetImpl
                 Key: HDFS-10682
                 URL: https://issues.apache.org/jira/browse/HDFS-10682
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Chen Liang
            Assignee: Chen Liang


Add a metric to measure the time the lock of FSDataSetImpl is held by a thread. The goal is
to expose this for users to identify operations that locks dataset for long time ("long" in
some sense) and be able to understand/reason/track the operation based on logs.



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