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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-9267) StochasticLoadBalancer goes over its processing time limit
Date Mon, 19 Aug 2013 22:07:48 GMT
Jean-Daniel Cryans created HBASE-9267:
-----------------------------------------

             Summary: StochasticLoadBalancer goes over its processing time limit
                 Key: HBASE-9267
                 URL: https://issues.apache.org/jira/browse/HBASE-9267
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.95.2
            Reporter: Jean-Daniel Cryans
            Assignee: Elliott Clark
             Fix For: 0.98.0, 0.95.3


I trying out 0.95.2, I left it running over the weekend (8 RS, average load between 12 and
3 regions) and right now the balancer runs for 12 mins:

bq. 2013-08-19 21:54:45,534 DEBUG [jdec2hbase0403-1.vpc.cloudera.com,60000,1376689696384-BalancerChore]
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer: Could not find a better load
balance plan.  Tried 0 different configurations in 777309ms, and did not find anything with
a computed cost less than 36.32576937689094

It seems it slowly crept up there, yesterday it was doing:

bq. 2013-08-18 20:53:17,232 DEBUG [jdec2hbase0403-1.vpc.cloudera.com,60000,1376689696384-BalancerChore]
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer: Could not find a better load
balance plan.  Tried 0 different configurations in 257374ms, and did not find anything with
a computed cost less than 36.3251082542424

And originally it was doing 1 minute.

In the jstack I see a 1000 of these and jstack doesn't want to show me the whole thing:

bq.  at java.util.SubList$1.nextIndex(AbstractList.java:713)

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