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  1. Kylin
  2. KYLIN-1581

NPE in Job engine when execute MR job

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: v1.5.0, v1.5.1
    • Fix Version/s: v1.5.2
    • Component/s: None
    • Labels:
      None

      Description

      An NPE throws when executing a job step:

      org.apache.kylin.job.exception.ExecuteException: java.lang.NullPointerException
      at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:124)
      at org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:124)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:745)
      Caused by: java.lang.NullPointerException
      at org.apache.kylin.engine.mr.common.MapReduceExecutable.onExecuteStart(MapReduceExecutable.java:77)
      at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:105)
      at org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:50)
      at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:114)
      ... 4 more
      
      

      It looks like that, this step had been executed before, maybe after a restart it wants to check the job's status from hadoop, but the recorded job id wasn't found in hadoop, caused this NPE.

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            • Assignee:
              shaofengshi Shao Feng Shi
              Reporter:
              shaofengshi Shao Feng Shi
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              Dates

              • Created:
                Updated:
                Resolved: