[YARN-4263] Capacity scheduler 60%-40% formatting floating point issue

• Type: Bug
• Status: Patch Available
• Priority: Trivial
• Resolution: Unresolved
• Affects Version/s: 2.7.1
• Component/s: client
• Labels: easyfix oct16-easy
• Target Version/s: 2.7.1

Release Note

Minor fix on queue capacity value formatting for the command
'hadoop queue -list'

• Assignee: Unassigned
• Reporter: Adrian Kalaszi
• Created: 14/Oct/15 15:16
• Updated: 29/Oct/16 16:04

Description

If capacity scheduler is set with two queues to 60% and 40% capacity, due to a java float floating representation issue

> hadoop queue -list
======================
Queue Name : default 
Queue State : running 
Scheduling Info : Capacity: 40.0, MaximumCapacity: 100.0, CurrentCapacity: 0.0 
======================
Queue Name : large 
Queue State : running 
Scheduling Info : Capacity: 60.000004, MaximumCapacity: 100.0, CurrentCapacity: 0.0 

Because

 System.err.println((0.6f) * 100); 

results in 60.000004.