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https://issues.apache.org/jira/browse/HBASE-24138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17078935#comment-17078935
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Hudson commented on HBASE-24138:
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Results for branch branch-2
[build #2591 on
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/2591/]:
(x) *{color:red}-1 overall{color}*
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details (if available):
(/) {color:green}+1 general checks{color}
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(x) {color:red}-1 jdk8 hadoop3 checks{color}
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(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> Ensure StochasticLoadBalancer can log details of decision to not run balancer
> -----------------------------------------------------------------------------
>
> Key: HBASE-24138
> URL: https://issues.apache.org/jira/browse/HBASE-24138
> Project: HBase
> Issue Type: Task
> Components: Balancer, Operability
> Reporter: Sean Busbey
> Assignee: Sean Busbey
> Priority: Major
>
> Ran into a customer case where the StochasticLoadBalancer was consistently
> deciding not to balance when bringing new region servers on line. Even
> setting the class to TRACE logging would only log a summary statement like:
> {code}
> 2020-04-03 00:29:55,133 TRACE
> org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer: Skipping load
> balancing because balanced cluster; total cost is 25.24853189705185, sum
> multiplier is 602.0 min cost which need balance is 0.05
> {code}
> Without any details about what went into that decision it's really hard to
> figure out what we need to tune to get the behavior we want.
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