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Hadoop, mail # user - Unexpected Hadoop behavior: map task re-running after reducer has been running


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David Parks 2013-03-11, 08:23
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David Parks 2013-03-11, 08:30
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Ravi Prakash 2013-03-11, 17:00
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Re: Unexpected Hadoop behavior: map task re-running after reducer has been running
Bejoy Ks 2013-03-11, 13:16
Hi David

The issue with the maps getting re triggered is because one of the node
where map outputs are stored are getting lost during reduce phase. As a
result of this the map outputs are no longer availabe from that node for
reduce to process and the job is again re triggered.

Can you try re triggering the job after increasing the value for
tasktracker.http.threads

Regards
Bejoy KS