Colin Patrick McCabe created HDFS-4307:
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             Summary: SocketCache should use monotonic time
                 Key: HDFS-4307
                 URL: https://issues.apache.org/jira/browse/HDFS-4307
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.0.3-alpha
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe
            Priority: Minor


{{SocketCache}} should use monotonic time, not wall-clock time.  Otherwise, if 
the time is adjusted by ntpd or a system administrator, sockets could be either 
abrupbtly expired, or left in the cache indefinitely.

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