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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CHUKWA-119) ChunkImpl requires ChukwaAgent class
Date Sat, 11 Apr 2009 20:30:15 GMT

    [ https://issues.apache.org/jira/browse/CHUKWA-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12698131#action_12698131
] 

Eric Yang commented on CHUKWA-119:
----------------------------------

The source of the problem is caused by the new agentMetrics.  It prevents ChukwaAgent from
initialize properly in Collector's vm.  We should use hadoop MetricsContext to calculate chukwa
metrics.  It is better to send the stats as chucks since it's light weight and reuse our own
code.

> ChunkImpl requires ChukwaAgent class
> ------------------------------------
>
>                 Key: CHUKWA-119
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-119
>             Project: Hadoop Chukwa
>          Issue Type: Bug
>            Reporter: Jerome Boulon
>            Assignee: Jerome Boulon
>            Priority: Blocker
>
> If ChukwaAgent class is not available on the collector side, the collector is unable
to read a chunk.
> // code
> ChunkImpl() {
>     this.tags = ChukwaAgent.getTags();
>   }
> // Stacktrace
> Java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.chukwa.datacollection.agent.ChukwaAgent
> 	at org.apache.hadoop.chukwa.ChunkImpl.<init>(ChunkImpl.java:46)
> 	at org.apache.hadoop.chukwa.ChunkImpl.read(ChunkImpl.java:229)
> 	at org.apache.hadoop.chukwa.datacollection.collector.servlet.ServletCollector.accept(ServletCollector.java:140)

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