Affects Version/s: 1.1.0
Fix Version/s: 1.1.1
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 grew 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.