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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1291) JobTracker fails to remove setup tip mapping from taskidToTIPMap if the job gets killed before the setup returns
Date Mon, 14 Dec 2009 09:00:20 GMT
JobTracker fails to remove setup tip mapping from taskidToTIPMap if the job gets killed before
the setup returns
----------------------------------------------------------------------------------------------------------------

                 Key: MAPREDUCE-1291
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1291
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: jobtracker
            Reporter: Amar Kamat
            Priority: Critical


Here is the scenario :
1) job inits
2) setup task is launched on tt1 and an entry is made in taskidToTIPMap
3) job is killed
4) cleanup gets launched on tt2
5) cleanup returns KILLING the job and removing all the *completed* setup/map/reduce task
mappings from taskidToTIPMap. Here the setup is still RUNNING state.
6) job retires and all the map/reduce mappings from taskidToTIPMap are removed
 
In the end the setup tip still lingers in the taskidToTIPMap map. Because of the backreference
from the tip to jip, the whole job stays in memory forever.

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