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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7436) Bundle Chukwa Metrics plugin in Hadoop
Date Thu, 30 Jun 2011 20:15:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13058051#comment-13058051
] 

Eric Yang commented on HADOOP-7436:
-----------------------------------

Metrics plugin is like a driver software.  Linux kernel bundles compatible drivers in the
source tarball.  This is no different, it is easier to certify a software driver if it is
included in the kernel source with test cases.  If a broken driver is not fixed, it is easy
to remove.  The power and responsibilities are in the hand of the Hadoop PMC.  If Hadoop community
don't make integration easy, then it depends on third party to make the integration happen.
 The distributed integration approach only drains developers from Hadoop community.  This
is something I would like to avoid.


> Bundle Chukwa Metrics plugin in Hadoop
> --------------------------------------
>
>                 Key: HADOOP-7436
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7436
>             Project: Hadoop Common
>          Issue Type: New Feature
>         Environment: Java 6
>            Reporter: Eric Yang
>            Assignee: Eric Yang
>
> For monitoring hadoop cluster with Chukwa, the current step is to copy chukwa-hadoop-*-client.jar
and json-simple to hadoop classpath. (i.e. $HADOOP_HOME/lib or $HADOOP_PREFIX/share/hadoop/lib),
and modify the hadoop-metrics.properties to use org.apache.hadoop.chukwa.inputtools.log4j.Log4JMetricsContext
for emitting metrics.  It is preferred to reduce the number of manual steps that is required
to enable chukwa monitored hadoop cluster by moving the plugin code into hadoop code base.
 It is similar to bundling Ganglia metrics plugin in Hadoop code base.

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