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From Harold Lim <rold...@yahoo.com>
Subject About Mumak exceptions
Date Tue, 14 Sep 2010 00:39:32 GMT
Hi,

Sometimes when I run mumak, I'll get the following exception. I would rerun it with exactly
same trace files and eventually it will succeed without any exceptions.

Any idea why I'm getting this exception?

Exception in thread "main" java.lang.NullPointerException
    at org.apache.hadoop.tools.rumen.ZombieJob.makeUpMapRuntime(ZombieJob.java:749)
    at org.apache.hadoop.tools.rumen.ZombieJob.makeUpTaskAttemptInfo(ZombieJob.java:684)
    at org.apache.hadoop.tools.rumen.ZombieJob.getMapTaskAttemptInfoAdjusted(ZombieJob.java:475)
    at org.apache.hadoop.mapred.SimulatorJobStory.getMapTaskAttemptInfoAdjusted(SimulatorJobStory.java:61)
    at org.apache.hadoop.mapred.SimulatorJobInProgress.getMapTaskAttemptInfo(SimulatorJobInProgress.java:216)
    at org.apache.hadoop.mapred.SimulatorJobInProgress.getTaskAttemptInfo(SimulatorJobInProgress.java:261)
    at org.apache.hadoop.mapred.SimulatorJobTracker.heartbeat(SimulatorJobTracker.java:443)
    at org.apache.hadoop.mapred.SimulatorTaskTracker.processHeartbeatEvent(SimulatorTaskTracker.java:675)
    at org.apache.hadoop.mapred.SimulatorTaskTracker.accept(SimulatorTaskTracker.java:188)
    at org.apache.hadoop.mapred.SimulatorEngine.run(SimulatorEngine.java:235)
    at org.apache.hadoop.mapred.SimulatorEngine.run(SimulatorEngine.java:259)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:69)
    at org.apache.hadoop.mapred.SimulatorEngine.main(SimulatorEngine.java:251)



-Harold


      

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