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From "Arpit Gupta (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4749) Killing multiple attempts of a task taker longer as more attempts are killed
Date Thu, 25 Oct 2012 00:42:12 GMT
Arpit Gupta created MAPREDUCE-4749:
--------------------------------------

             Summary: Killing multiple attempts of a task taker longer as more attempts are
killed
                 Key: MAPREDUCE-4749
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4749
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 1.1.0
            Reporter: Arpit Gupta


The following was noticed on a mr job running on hadoop 1.1.0

1. Start an mr job with 1 mapper

2. Wait for a min

3. Kill the first attempt of the mapper and then subsequently kill the other 3 attempts in
order to fail the job

The time taken to kill the task grep exponentially.

1st attempt was killed immediately.
2nd attempt took a little over a min
3rd attempt took approx. 20 mins
4th attempt took around 3 hrs.

The command used to kill the attempt was "hadoop job -fail-task"

Note that the command returned immediately as soon as the fail attempt was accepted but the
time the attempt was actually killed was as stated above.


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