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MapReduce >> mail # user >> Job exceeded Reduce Input limit


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Re: Job exceeded Reduce Input limit
Can you share with us your completed stack?
- Java and Hadoop version?
- Config files?
- Cluster distribution? (Numbers of NN and DN)
- O.S
If it is possible, your hardware too.

Best wishes

On 07/06/2012 10:57 AM, Robert Evans wrote:
> What version of hadoop are you using?
>
> From: Stephen Boesch <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
> Reply-To: "[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>"
> <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>>
> To: "[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>"
> <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>>
> Subject: Job exceeded Reduce Input limit
>
>
> I am running a (terasort) job on a small cluster but with powerful
> nodes.  The number of reducer slots was 12.  I am seeing the following
> message:
> Job JOBID="job_201207031814_0011" FINISH_TIME="1341389866650"
> JOB_STATUS="FAILED" FINISHED_MAPS="42" FINISHED_REDUCES="0"
> FAIL_REASON="Job exceeded Reduce Input limit  Limit:  10737418240
> Estimated: 102000004905" .
>
>
> Now this apparently was added recently:
>
> http://mail-archives.apache.org/mod_mbox/hadoop-common-commits/201103.mbox/%[EMAIL PROTECTED]%3E
>
>
> It looks that the solution would be to set
> mapreduce.reduce.input.limit to -1:
>
>
>   <property>
> +  <name>mapreduce.reduce.input.limit</name>
> +  <value>-1</value>
> +  <description>The limit on the input size of the reduce. If the estimated
> +  input size of the reduce is greater than this value, job is failed. A
> +  value of -1 means that there is no limit set. </description>
> +</property>
> I did that (in mapred-site.xml). But it did not affect the behavior  i.e. the problem continues.
> Any hints appreciated.
> thx!
>
>
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