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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/12723742/HBASE-13376_0.txt against master branch at commit d5e81523f719d54e44d24cf6ef8112355aa6281a. ATTACHMENT ID: 12723742 {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 3 new or modified tests. {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions (2.4.1 2.5.2 2.6.0) {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 protoc{color}. The applied patch does not increase the total number of protoc compiler warnings. {color:green}+1 javadoc{color}. The javadoc tool did not generate any warning messages. {color:green}+1 checkstyle{color}. The applied patch does not increase the total number of checkstyle errors {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 2.0.3) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:green}+1 lineLengths{color}. The patch does not introduce lines longer than 100 {color:green}+1 site{color}. The mvn site goal succeeds with this patch. {color:red}-1 core tests{color}. The patch failed these unit tests: org.apache.hadoop.hbase.coprocessor.TestMasterObserver org.apache.hadoop.hbase.TestRegionRebalancing Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/13602//testReport/ Release Findbugs (version 2.0.3) warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13602//artifact/patchprocess/newFindbugsWarnings.html Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/13602//artifact/patchprocess/checkstyle-aggregate.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/13602//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: HBASE-13376_0.98.txt, HBASE-13376_0.txt, > HBASE-13376_98.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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)