FAQ
Hi,

I am running Select * from table fails . But reduce task fails giving error
:-

Ended Job = job_201010011018_0001 with errors
FAILED: Execution Error, return code 2 from
org.apache.hadoop.hive.ql.exec.MapRedTask

2010-10-01 10:01:38,915 FATAL org.apache.hadoop.mapred.TaskTracker: Task:
attempt_201010010859_0005_r_000000_3 - Killed :
java.lang.NullPointerException
at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2683)
at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2605)

Vaibhav Negi

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  • Steven Wong at Oct 1, 2010 at 6:27 pm
    I can't tell what the exact problem is, but it looks like your Hadoop cluster (not Hive) has a setup/configuration problem. Googling ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents reveals that other people reported this exception before; see if they found solutions.


    From: vaibhav negi
    Sent: Friday, October 01, 2010 3:38 AM
    To: hive-user@hadoop.apache.org
    Subject: Select * from table fails : Killed : java.lang.NullPointerException

    Hi,

    I am running Select * from table fails . But reduce task fails giving error :-

    Ended Job = job_201010011018_0001 with errors
    FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.MapRedTask

    2010-10-01 10:01:38,915 FATAL org.apache.hadoop.mapred.TaskTracker: Task: attempt_201010010859_0005_r_000000_3 - Killed : java.lang.NullPointerException
    at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
    at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2683)
    at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2605)

    Vaibhav Negi

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postedOct 1, '10 at 10:38a
activeOct 1, '10 at 6:27p
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