Arpit Gupta created MAPREDUCE-4749:
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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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