[HBASE-8710] The balancer shouldn't try balancing one node

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.95.1
• Fix Version/s: 0.98.0, 0.96.0
• Hadoop Flags: Reviewed
• Release Note: The balancer will not try balancing the regions when there's only one node.
• Assignee: James Kinley
• Reporter: Jean-Daniel Cryans
• Created: 07/Jun/13 22:15
• Updated: 20/Nov/15 11:53
• Resolved: 02/Oct/13 17:10

Description

In my logs, testing 0.95.1 RC1, I see:

2013-06-07 17:31:47,377 DEBUG [ip-10-20-46-44.novalocal,48569,1370640098134-BalancerChore] balancer.StochasticLoadBalancer: Could not find a better load balance plan.  Tried 3200 different configurations in 27ms, and did not find anything with a computed cost less than 25.0

Ideally we'd not even try one configuration, let alone 3.2k.