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From "John Vines (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-605) NPE on MasterMonitorInfo also spammy
Date Thu, 24 May 2012 14:32:54 GMT
John Vines created ACCUMULO-605:

             Summary: NPE on MasterMonitorInfo also spammy
                 Key: ACCUMULO-605
             Project: Accumulo
          Issue Type: Bug
          Components: monitor
    Affects Versions: 1.5.0-SNAPSHOT
            Reporter: John Vines
            Assignee: John Vines

Just like ACCUMULO-604, this message started occuring when the master went down. Got the following
23 11:06:33,862 [monitor.Monitor] WARN : 
        at org.apache.accumulo.server.monitor.Monitor.fetchData(
        at org.apache.accumulo.server.monitor.Monitor$

This message occurred very ~5 seconds or so, and we had instances of it occurring around 7k
times as well. The frequency of this and ACCUMULO-604 makes me wonder if we have a weird threading
issue, or something along those lines (however, when I jstacked the monitor I didn't see thousands
of threads, so I'm doubtful).

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