[jira] [Commented] (HADOOP-16320) Workaround bug with commons-configuration to be able to emit Ganglia metrics to multiple sink servers

["Thomas Poepping (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-16320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16842821#comment-16842821 ] 

Thomas Poepping commented on HADOOP-16320:
------------------------------------------

Bug in commons-configuration was found by experiment. This is reproducible by starting more than one ganglia server and providing a comma-separated list in the configuration.

> Workaround bug with commons-configuration to be able to emit Ganglia metrics to multiple sink servers
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-16320
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16320
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 2.9.2, 2.9.3
>            Reporter: Thomas Poepping
>            Assignee: Thomas Poepping
>            Priority: Minor
>         Attachments: HADOOP-16320.patch
>
>
> AbstractGangliaSink is used by the hadoop-metrics2 package to emit metrics to Ganglia. Currently, this class uses the apache commons-configuration package to read from the hadoop-metrics2.properties file. commons-configuration is outdated, and has a bug where the .getString function drops everything after the first comma. This change uses .getList instead, which will work for one or many Ganglia sink servers.
>  
> This is fixed in trunk by upgrading to commons-configuration2, which doesn't have the bug anymore.



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