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Hive >> mail # user >> Reduce phase hangs


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Robin Verlangen 2012-11-08, 10:33
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Re: Reduce phase hangs
Hello Robin,

        Look at the TaskTracker logs and see if you find anything
interesting there.

Regards,
    Mohammad Tariq

On Thu, Nov 8, 2012 at 4:03 PM, Robin Verlangen <[EMAIL PROTECTED]> wrote:

> Hi there,
>
> It seems that some of my jobs hang in the reduce phase for a very long
> time (for example, days). Is there anything I could tweak on? The query is
> pretty simple, like:
>
> SELECT SUM(colA), to_date(colB) AS dt FROM table GROUP BY to_date(colB)
> ORDER BY dt ASC;
>
> Best regards,
>
> Robin Verlangen
> *Software engineer*
> *
> *
> W http://www.robinverlangen.nl
> E [EMAIL PROTECTED]
>
> <http://goo.gl/Lt7BC>
>
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Robin Verlangen 2012-11-08, 10:47
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Robin Verlangen 2012-11-08, 12:09
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Mohammad Tariq 2012-11-08, 13:15
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Robin Verlangen 2012-11-08, 13:23
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Mark Grover 2012-11-09, 07:19
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB