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From Devaraj Das <d...@hortonworks.com>
Subject Re: "java.lang.Throwable: Child Error " And " Task process exit with nonzero status of 1."
Date Mon, 11 Jul 2011 06:20:12 GMT
Moving this to mapreduce-user (this is the right list)..

Could you please look at the TaskTracker logs around the time when you see the task failure.
That might have something more useful for debugging..


On Jul 10, 2011, at 8:14 PM, Michael Hu wrote:

> Hi,all,
>    The hadoop is set up. Whenever I run a job, I always got the same error.
> Error is:
> 
>    micah29@nc2:/usr/local/hadoop/hadoop$ ./bin/hadoop jar
> hadoop-mapred-examples-0.21.0.jar wordcount test testout
> 
> *11/07/11 10:48:59 INFO mapreduce.Job: Running job: job_201107111031_0003
> 11/07/11 10:49:00 INFO mapreduce.Job:  map 0% reduce 0%
> 11/07/11 10:49:11 INFO mapreduce.Job: Task Id :
> attempt_201107111031_0003_m_000002_0, Status : FAILED
> java.lang.Throwable: Child Error
>        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:249)
> Caused by: java.io.IOException: Task process exit with nonzero status of 1.
>        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:236)
> 
> 11/07/11 10:49:11 WARN mapreduce.Job: Error reading task
> outputhttp://nc2:50060/tasklog?plaintext=true&attemptid=attempt_201107111031_0003_m_000002_0&filter=stdout
> 11/07/11 10:49:11 WARN mapreduce.Job: Error reading task
> outputhttp://nc2:50060/tasklog?plaintext=true&attemptid=attempt_201107111031_0003_m_000002_0&filter=stderr
> *
> 
>    I google the " Task process exit with nonzero status of 1." They say
> 'it's an OS limit on the number of sub-directories that can be related in
> another directory.' But I can create any sub-directories related in another
> directory.
> 
>    Please, could anybody help me to solve this problem? Thanks
> -- 
> Yours sincerely
> Hu Shengqiu


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