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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14706) RegionLocationFinder should return multiple servername by top host
Date Fri, 30 Oct 2015 02:42:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14981764#comment-14981764
] 

Hadoop QA commented on HBASE-14706:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12769677/HBASE-14706-trunk_v1.patch
  against master branch at commit bdf11be6af046e99cff9985968903d983d7ff10f.
  ATTACHMENT ID: 12769677

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 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/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestRegionLocationFinder.java:[46,2]
cannot find symbol
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:testCompile
(default-testCompile) on project hbase-server: Compilation failure
[ERROR] /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestRegionLocationFinder.java:[46,2]
cannot find symbol
[ERROR] symbol: class Category
[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/16296//console

This message is automatically generated.

> RegionLocationFinder should return multiple servername by top host
> ------------------------------------------------------------------
>
>                 Key: HBASE-14706
>                 URL: https://issues.apache.org/jira/browse/HBASE-14706
>             Project: HBase
>          Issue Type: Bug
>          Components: Balancer
>    Affects Versions: 2.0.0, 1.2.0, 1.3.0
>            Reporter: Guanghao Zhang
>            Assignee: Guanghao Zhang
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14706-trunk_v1.patch, HBASE-14706.patch
>
>
> Multiple RS can run on the same host. But in current RegionLocationFinder, mapHostNameToServerName
map one host to only one server. This will make LocalityCostFunction get wrong locality about
region.
> {code}
>     // create a mapping from hostname to ServerName for fast lookup
>     HashMap<String, ServerName> hostToServerName = new HashMap<String, ServerName>();
>     for (ServerName sn : regionServers) {
>       hostToServerName.put(sn.getHostname(), sn);
>     }
> {code}



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