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https://issues.apache.org/jira/browse/CHUKWA-440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794132#action_12794132
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Jerome Boulon commented on CHUKWA-440:
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-1 - Again this should not done by manually adding jars.
There's a generic way to do that in hadoop world using the -libjars flag,
there's no point of adding chukwa specific code here, the problem has already
been solved in hadoop.
So instead of adding some chukwa specific code to add the jar, we should
enhance the demux script to look for additional jars and use the -libjars flag.
if the -libjars is not working for demux that's another issue but since we are
implementing Tools it should already be supported.
> Custom processor classes not detected unless added to chukwa-core jar
> ---------------------------------------------------------------------
>
> Key: CHUKWA-440
> URL: https://issues.apache.org/jira/browse/CHUKWA-440
> Project: Hadoop Chukwa
> Issue Type: Bug
> Components: Data Processors
> Reporter: Bill Graham
>
> http://wiki.apache.org/hadoop/DemuxModification
> After implementing a custom parser as shown in the wiki link above and
> mapping it to a data type in chukwa-demux.xml, there's no easy way to
> register the class so it gets included in the job that's submitted to the
> hadoop cluster. I've added my jar containing the class to the lib/ directory
> of the chukwa data processor install and verified that it's in the
> classapath, but it's not submitted with the Hadoop job. On the Hadoop cluster
> ClassNotFoundExceptions are thrown in my mapper.
> The only way I've been able to make this work is to do the following:
> 1. put my class in the package
> org.apache.hadoop.chukwa.extraction.demux.processor.mapper
> 2. then manually add that class to the chukwa-core-0.3.0.jar that is on my
> data processor
> Instead, the class should be detected from whatever jar it lives in that's in
> the demux class path, regardless of the package it lives in.
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