[HBASE-3906] When HMaster is running,there are a lot of RegionLoad instances（far greater than the regions）,it has risk of OOME.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.90.2, 0.90.3
• Fix Version/s: 0.90.4
• Component/s: master

Environment

1 hmaster,4 regionserver,about 100,000 regions.

• Hadoop Flags: Reviewed
• Assignee: Unassigned
• Reporter: jian zhang
• Created: 20/May/11 04:28
• Updated: 20/Nov/15 12:43
• Resolved: 26/May/11 03:58

Description

1、Start hbase cluster;
2、After hmaster finish regions assignement,use jmap to dump the memory of hmaster;
3、Use MAT to analyse the dump file,there are too many RegionLoad instances,and these instances occupy more than 3G memory;