[YARN-447] applicationComparator improvement for CS

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.3-alpha
• Fix Version/s: 2.1.0-beta
• Component/s: scheduler
• Target Version/s: 2.1.0-beta
• Hadoop Flags: Reviewed
• Assignee: Nemon Lou
• Reporter: Nemon Lou
• Created: 04/Mar/13 12:21
• Updated: 27/Aug/13 22:15
• Resolved: 02/Apr/13 07:00

Description

Now the compare code is :
return a1.getApplicationId().getId() - a2.getApplicationId().getId();

Will be replaced with :
return a1.getApplicationId().compareTo(a2.getApplicationId());

This will bring some benefits:
1,leave applicationId compare logic to ApplicationId class;
2,In future's HA mode,cluster time stamp may change,ApplicationId class already takes care of this condition.