[ https://issues.apache.org/jira/browse/HADOOP-13477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16911716#comment-16911716 ] 

Hadoop QA commented on HADOOP-13477:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m 10s{color} | {color:red} HADOOP-13477 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HADOOP-13477 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12823013/HADOOP-13477.002.patch |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/16495/console |
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> Hadoop metrics can be only sent to the first ganglia gmond server
> -----------------------------------------------------------------
>
>                 Key: HADOOP-13477
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13477
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 2.7.2, 2.6.4
>            Reporter: JerryXin
>            Assignee: JerryXin
>            Priority: Minor
>              Labels: ganglia, metrics, stale
>         Attachments: HADOOP-13477.001.patch, HADOOP-13477.002.patch
>
>
> Ganglia metrics can be only sent to the first metric server.
> If I config namenode.sink.ganglia.servers=host1:8649,host2:8649 in hadoop-metrics2.properties,then metrics can only be sent to host1,host2 will never receive them.This means if  gmond on host1 is down,metrics will not be collected.
> This happens because GangliaSink parse metric servers use a getString method in SubsetConfiguration,while this method return only the first element in the list.



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