[HBASE-1868] Spew about rebalancing but none done....

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.20.1

Environment

0.20.0 RC2

• Assignee: Michael Stack
• Reporter: Michael Stack
• Created: 25/Sep/09 16:54
• Updated: 20/Nov/15 13:02
• Resolved: 05/Oct/09 22:44

Description

I'm seeing loads of this in logs:

2009-09-24 21:27:22,130 DEBUG org.apache.hadoop.hbase.master.RegionManager: Server XX.XX.XX.100,20020,1253219583523 will be unloaded for balance. Server load: 5 avg: 3.78, regions can be moved: 4

Its like balancer is coming up w/ wrong answer to question... I don't see subsequent stuff going on... It does it over and over for hours.

Then a split comes in and its seems to shake things up. I see it do a bunch of assigning.

2009-09-24 21:41:02,784 INFO org.apache.hadoop.hbase.master.ServerManager: Processing MSG_REPORT_SPLIT: locations,,1253657949707: Daughters; locations,,1253
828460677, locations,http:\x2F\x2Fen.wikipedia.org\x2Fwiki\x2FLarry_Lucchino,1253828460677 from aa0-009-2.u.powerset.com,20020,1253219584971; 1 of 3
2009-09-24 21:41:02,784 DEBUG org.apache.hadoop.hbase.master.RegionManager: Assigning for address: XX.XX.XX.6:20020, startcode: 1253219584971, load: (reque
sts=5213, regions=3, usedHeap=114, maxHeap=2031): total nregions to assign=2, nregions to reach balance=4, isMetaAssign=false
2009-09-24 21:41:02,820 DEBUG org.apache.hadoop.hbase.master.RegionManager: Assigning for address: XX.XX.XX.96:20020, startcode: 1253219584175, load: (requ
ests=12, regions=4, usedHeap=404, maxHeap=2031): total nregions to assign=2, nregions to reach balance=4, isMetaAssign=false
...

Then back to the 'will be unloaded'... message.

A new split comes in and then the assigning gets triggered again... a few regions are opened but not enough.

Eventually it goes back to 'normal' (average load went to 3.85 from 3.8?)