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MapReduce, mail # user - common error in map tasks


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Re: common error in map tasks
kaveh minooie 2013-04-22, 21:09
thanks. that is the issue, there is no other log files. when i go to the
attempt directory of that failed map task (e.g.
userlogs/job_201304191712_0015/attempt_201304191712_0015_m_000019_0 ) it
is empty. there is no other log file. thou based on the counter value, I
can say that it happens right at the beginning of the map task (counter
is only 1 )

On 04/22/2013 02:12 AM, 姚吉龙 wrote:
> Hi
>
>
> I have the same problem before
> I think this is caused by the lack of memory shortage for map task.
> It is just a suggestion,you can post your log
>
>
> BRs
> Geelong
> —
> Sent from Mailbox <https://bit.ly/SZvoJe> for iPhone
>
>
> On Mon, Apr 22, 2013 at 4:34 PM, kaveh minooie <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
>
>     HI
>
>     regardless of what job I run, there are always a few map tasks that
>     fail with the following, very unhelpful, message: ( that is the
>     entire error message)
>
>     java.lang.Throwable: Child Error
>     at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
>     Caused by: java.io.IOException: Task process exit with nonzero status of 126.
>     at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)
>
>
>     I would appreciate it if someone could show me how I could figure
>     out why this error keeps happening.
>
>     thanks,
>
>

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Kaveh Minooie