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https://issues.apache.org/jira/browse/HBASE-25790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17338374#comment-17338374
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Hudson commented on HBASE-25790:
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Results for branch master
[build #280 on
builds.a.o|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/280/]:
(/) *{color:green}+1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/280/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/280/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/master/280/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> NamedQueue 'BalancerRejection' for recent history of balancer skipping
> ----------------------------------------------------------------------
>
> Key: HBASE-25790
> URL: https://issues.apache.org/jira/browse/HBASE-25790
> Project: HBase
> Issue Type: Sub-task
> Components: Balancer, master
> Reporter: Zhuoyue Huang
> Assignee: Zhuoyue Huang
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.5.0, 2.4.3
>
>
> [HBASE-24528|https://issues.apache.org/jira/browse/HBASE-24528] implements a
> NamedQueue that saved recent history of balancer decision details. Since we
> want to know exactly why the balancer is skipping to run, we need a new
> namedQueue called 'BalancerRejection' to hold the history of all details
> information why the balancer was rejected to run(skipping). LogEntry of
> 'BalancerRejection' should contain the information below:
> 1. Reason, to show why this time balancer was rejected
> Maybe look like:
>
> {code:java}
> (cost1*multiplier1+cost2*multiplier2+...+costn*multipliern)/sumMultiplier=0.025
> <= minCostNeedBalance(0.35)
> {code}
> 2. Detail cost factors and multipliers
> Maybe look like:
> {code:java}
> org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer$RegionCountSkewCostFunction
> cost:0.0 multiplier:500.0
> org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer$MoveCostFunction
> cost:0.0 multiplier:7.0
> org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer$RackLocalityCostFunction
> cost:1.0 multiplier:15.0
> {code}
>
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