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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9577) ReadStatistics not thread safe when hedged read is enabled
Date Fri, 18 Dec 2015 20:53:46 GMT
Ming Ma created HDFS-9577:
-----------------------------

             Summary: ReadStatistics not thread safe when hedged read is enabled
                 Key: HDFS-9577
                 URL: https://issues.apache.org/jira/browse/HDFS-9577
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Ming Ma


When hedged read is enabled, the actual read will be called on the hedged thread pool which
will also call {{updateReadStatistics}}. However, it seems {{ReadStatistics}} doesn't use
atomic types for its metrics. [~xieliang007], can you please confirm?



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