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From Alexander Alten-Lorenz <wget.n...@gmail.com>
Subject Re: <alo.alt> Hive shows counters limit exeed
Date Tue, 01 Jan 2013 11:51:44 GMT
Hi,

Please read the netiquette to post on mailinglists. First good start is a Subject.

http://mapredit.blogspot.de/2012/12/hive-query-error-too-many-counters.html

- Alex 

On Dec 31, 2012, at 4:45 PM, Krishna Rao <krishnanjrao@gmail.com> wrote:

> A particular query that I run fails with the following error:
> 
> ***
> Job 18: Map: 2  Reduce: 1   Cumulative CPU: 3.67 sec   HDFS Read: 0 HDFS
> Write: 0 SUCCESS
> Exception in thread "main"
> org.apache.hadoop.mapreduce.counters.LimitExceededException: Too many
> counters: 121 max=120
> ...
> ***
> 
> Googling suggests that I should increase "mapreduce.job.counters.limit".
> And that the number of counters a job uses
> has an effect on the memory used by the JobTracker, so I shouldn't increase
> this number too high.
> 
> Is there a rule of thumb for what this number should be as a function of
> JobTracker memory? That is should I be cautious and
> increase by 5 at a time, or could I just double it?
> 
> Cheers,
> 
> Krishna

--
Alexander Alten-Lorenz
http://mapredit.blogspot.com
German Hadoop LinkedIn Group: http://goo.gl/N8pCF


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