[MAPREDUCE-5593] Cleanup code for AssignMapsWithLocality() in RMContainerAllocator

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: applicationmaster
• Assignee: Junping Du
• Reporter: Junping Du
• Created: 06/Sep/13 15:24
• Updated: 13/Nov/13 04:21

Description

In RMContainerAllocator, AssignMapsWithLocality() is a very important method to assign map tasks on allocated containers with conforming different level of locality (dataLocal, rackLocal, etc.). However, this method messed with different code logic to handle different type of locality but have lots of similar behaviours. This is hard to maintain as well as do extension with other locality type, so we need some more clear code here.

Issue Links

• is blocked by: MAPREDUCE-5427 TestRMContainerAllocator.testUpdatedNodes fails on jdk7