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From "Nigel Daley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1092) NullPointerException in HeartbeatMonitor thread
Date Thu, 08 Mar 2007 19:00:28 GMT
NullPointerException in HeartbeatMonitor thread
-----------------------------------------------

                 Key: HADOOP-1092
                 URL: https://issues.apache.org/jira/browse/HADOOP-1092
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.12.0
            Reporter: Nigel Daley
            Priority: Blocker
             Fix For: 0.12.1


Running NNBench with latest trunk, I saw this NPE in the Namenode log:

   Exception in thread "org.apache.hadoop.dfs.FSNamesystem$HeartbeatMonitor@182bcde" java.lang.NullPointerException
        at org.apache.hadoop.dfs.FSNamesystem.countContainingNodes(FSNamesystem.java:2506)
        at org.apache.hadoop.dfs.FSNamesystem.access$000(FSNamesystem.java:52)
        at org.apache.hadoop.dfs.FSNamesystem$UnderReplicationBlocks.update(FSNamesystem.java:456)
        at org.apache.hadoop.dfs.FSNamesystem.removeStoredBlock(FSNamesystem.java:2242)
        at org.apache.hadoop.dfs.FSNamesystem.removeDatanode(FSNamesystem.java:1876)
        at org.apache.hadoop.dfs.FSNamesystem.heartbeatCheck(FSNamesystem.java:1958)
        at org.apache.hadoop.dfs.FSNamesystem$HeartbeatMonitor.run(FSNamesystem.java:1698)
        at java.lang.Thread.run(Thread.java:619)

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