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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1868) Spew about rebalancing but none done....
Date Fri, 25 Sep 2009 16:56:16 GMT
Spew about rebalancing but none done....
----------------------------------------

                 Key: HBASE-1868
                 URL: https://issues.apache.org/jira/browse/HBASE-1868
             Project: Hadoop HBase
          Issue Type: Bug
         Environment: 0.20.0 RC2
            Reporter: stack


I'm seeing loads of this in logs:

{code}
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
{code}

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.

{code}
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
...
{code}

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?)



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