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https://issues.apache.org/jira/browse/HBASE-13376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14663042#comment-14663042
]
Hadoop QA commented on HBASE-13376:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12749386/HBASE-13376_2.patch
against master branch at commit d4fc7cf2ba0d06b040dad435ab72366c4fd44116.
ATTACHMENT ID: 12749386
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 6 new
or modified tests.
{color:red}-1 javac{color}. The patch appears to cause mvn compile goal to
fail with Hadoop version 2.4.0.
Compilation errors resume:
[ERROR] COMPILATION ERROR :
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[708,14]
cannot find symbol
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[725,32]
cannot find symbol
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[738,21]
cannot find symbol
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[742,21]
cannot find symbol
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[1188,31]
cannot find symbol
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on
project hbase-server: Compilation failure: Compilation failure:
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[708,14]
cannot find symbol
[ERROR] symbol: method calculateRegionServerLocalities()
[ERROR] location: variable cluster of type
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[725,32]
cannot find symbol
[ERROR] symbol: method getLeastLoadedTopServerForRegion(int)
[ERROR] location: variable cluster of type
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[738,21]
cannot find symbol
[ERROR] symbol: method getLowestLocalityRegionServer()
[ERROR] location: variable cluster of type
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[742,21]
cannot find symbol
[ERROR] symbol: method getLowestLocalityRegionOnServer(int)
[ERROR] location: variable cluster of type
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java:[1188,31]
cannot find symbol
[ERROR] symbol: method getLocalityOfRegion(int,int)
[ERROR] location: variable cluster of type
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :hbase-server
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/15012//console
This message is automatically generated.
> Improvements to Stochastic load balancer
> ----------------------------------------
>
> Key: HBASE-13376
> URL: https://issues.apache.org/jira/browse/HBASE-13376
> Project: HBase
> Issue Type: Improvement
> Components: Balancer
> Affects Versions: 1.0.0, 0.98.12
> Reporter: Vandana Ayyalasomayajula
> Assignee: Vandana Ayyalasomayajula
> Priority: Minor
> Attachments: 13376-v2.txt, HBASE-13376.patch, HBASE-13376_0.98.txt,
> HBASE-13376_0.txt, HBASE-13376_1.txt, HBASE-13376_1_1.txt,
> HBASE-13376_2.patch, HBASE-13376_2_branch-1.patch, HBASE-13376_98.patch,
> HBASE-13376_branch-1.patch
>
>
> There are two things this jira tries to address:
> 1. The locality picker in the stochastic balancer does not pick regions with
> least locality as candidates for swap/move. So when any user configures
> locality cost in the configs, the balancer does not always seems to move
> regions with bad locality.
> 2. When a cluster has equal number of loaded regions, it always picks the
> first one. It should pick a random region on one of the equally loaded
> servers. This improves a chance of finding a good candidate, when load picker
> is invoked several times.
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