[MAPREDUCE-2734] DistCp with FairScheduler assign all map tasks in one TT

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.21.0
• Fix Version/s: 2.3.0
• Component/s: jobtracker
• Assignee: Bochun Bai
• Reporter: Bochun Bai
• Created: 27/Jul/11 11:22
• Updated: 30/Jun/15 07:18
• Resolved: 21/May/14 21:23

Description

1 Using FairScheduler.
2 distcp a directory contains 5 files.

The DistCp job will launch 5 map tasks, and FairScheduler assign them to one TaskTracker.
It should be assigned different, like the original JobQueueScheduler.