[MAPREDUCE-515] CapacityTaskScheduler.MapSchedulingMgr.killTasksFromJob() will not work as expected

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Assignee: Unassigned
• Reporter: Amar Kamat
• Created: 10/Nov/08 11:20
• Updated: 09/Nov/09 09:32
• Resolved: 09/Nov/09 09:32

Description

Once capacity-scheduler decides on killing tasks, it selects running-jobs from the queue and issues killTasksFromJob(). The order in which it kills is as follows

• non-local maps
• local maps

Killing non-local maps :
The code here uses JobInProgress.getNonLocalRunningMaps(). HADOOP-2119 introduced this for handling cases like random-writer. Hence this api will return an empty structure if there are reducers in the job. Hence the code fails to serve its purpose.