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From "Jerome Boulon (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CHUKWA-12) Add instrumentation Api for Chukwa components
Date Wed, 01 Apr 2009 17:56:13 GMT

     [ https://issues.apache.org/jira/browse/CHUKWA-12?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jerome Boulon updated CHUKWA-12:
--------------------------------

    Attachment: CHUKWA-12-3.patch

Previous patch didn't apply because of CHUKWA-65 (hadoop metrics log files should be managed
more cleanly).

On top my prevous comments my patch:
- Remove all changes made to Log4JMetricsContext.java from  CHUKWA-65 
- Delete conf/chukwa-hadoop-metrics-log4j.properties
---> remove dependency on an external log4j file (conf/chukwa-hadoop-metrics-log4j.properties)
everything is done via hadoop-metrics.properties since there's a well defined way to pass
parameters to the MetricContext class

- Use JAVA API to set Read/Write permission (RW for ALL since another user need to delete
the file see: CHUKWA-65  )
--> this part is still not "clean" in my mind since anyone can RW ... but I don't have
a better idea for now
- Move conf/hadoop-metrics.properties to conf/hadoop-metrics.properties.template
- Fix bin/VERSION

> Add instrumentation Api for Chukwa components
> ---------------------------------------------
>
>                 Key: CHUKWA-12
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-12
>             Project: Hadoop Chukwa
>          Issue Type: New Feature
>            Reporter: Jerome Boulon
>            Assignee: Jerome Boulon
>            Priority: Blocker
>         Attachments: CHUKWA-12-2.patch, CHUKWA-12-3.patch, CHUKWA-12.patch, chukwa12
errors.txt
>
>
> Chukwa Components should be able to emit some metrics in an easy way.
> I'm thinking of reusing the new HADOOP JMX instrumentation API to do that + MetricsContext
to output/collect them using chukwa.

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