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https://issues.apache.org/jira/browse/HADOOP-1114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487926
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Michael Bieniosek commented on HADOOP-1114:
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While I accept that using CLASSPATH for dependencies is fragile and hacky, I'm
not sure why HADOOP_CLASSPATH is any different. It seems both environment
variables are equally abusable. Using CLASSPATH is much more intuitive than
the nonstandard HADOOP_CLASSPATH. The only problem that HADOOP_CLASSPATH seems
to solve is that a caller script might leave inherited garbage in CLASSPATH
before adding more jars. But that should be the responsibility of the caller
script, I think.
> bin/hadoop script clobbers CLASSPATH
> ------------------------------------
>
> Key: HADOOP-1114
> URL: https://issues.apache.org/jira/browse/HADOOP-1114
> Project: Hadoop
> Issue Type: Bug
> Components: scripts
> Affects Versions: 0.12.0
> Reporter: Michael Bieniosek
> Priority: Minor
> Fix For: 0.13.0
>
> Attachments: hadoop-no-clobber-classpath.patch
>
>
> The bin/hadoop script distributed with hadoop clobbers the user's CLASSPATH.
> This prevents ad-hoc appending to the CLASSPATH.
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