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https://issues.apache.org/jira/browse/MAPREDUCE-2485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032207#comment-13032207
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Tom Melendez commented on MAPREDUCE-2485:
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> What happens if CLASSPATH is pushed into mapred.child.env?
I'll add some test code here soon, but I tried this early on and it didn't work
for me.
> reinitialize CLASSPATH variable when executing Mapper/Reducer code
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-2485
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2485
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: pipes
> Affects Versions: 0.20.2
> Environment: Ubuntu 10.04 LTS
> Reporter: Tom Melendez
>
> We're using pipes, and using libhdfs inside our mapper and reducer code.
> We've determined that we need to execute a putenv call in order for libhdfs
> to actually have access to the CLASSPATH. Ideally, it should just use the
> CLASSPATH we set when the job was executed.
> For some more context, see these threads:
> https://groups.google.com/a/cloudera.org/group/cdh-user/browse_thread/thread/ae9808d80fb132fb?tvc=2
> http://comments.gmane.org/gmane.comp.jakarta.lucene.hadoop.user/25830
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