[YARN-122] CompositeService should clone the Configurations it passes to children

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Invalid
• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 15/Mar/12 16:36
• Updated: 02/May/13 02:29
• Resolved: 09/Apr/13 15:25

Description

CompositeService.init(Configuration) saves the configuration passed in and passes the same instance down to all managed services. This means a change in the configuration of one child could propagate to all the others.

Unless this is desired, the configuration should be cloned for each child.

Fast and easy fix; tests can be added to those coming in MAPREDUCE-4014

Issue Links

• depends upon: YARN-120 Make yarn-common services robust