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https://issues.apache.org/jira/browse/PIG-2622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aniket Mokashi resolved PIG-2622.
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Resolution: Won't Fix
Just wanted to document it in case anyone hits this. Marking as won't fix.
> Jython imports fails if the Lib modules are shipped under the jar
> -----------------------------------------------------------------
>
> Key: PIG-2622
> URL: https://issues.apache.org/jira/browse/PIG-2622
> Project: Pig
> Issue Type: Bug
> Reporter: Aniket Mokashi
>
> PySystemState has getJarFileName() api that does searches for the jar that
> has class PySystemState Class. The answer it expects is --
> jar:file:/install_dir/jython.jar!/org/python/core/PySystemState.class
> Then it pulls out </install_dir/jython.jar> out of above string and in
> initPath adds python.path and </install_dir/jython.jar>/Lib to sys.path.
> With MAPREDUCE-967, job.jar is not unpacked on the task node. The job.jar
> always has jython code (as pig ships it from scriptjars when register is
> invoked). Hence, above code path puts /Lib inside job.jar on sys.path and
> all works fine.
> But, without MAPREDUCE-967, job.jar is unpacked into jobcachedir. So,
> getJarFileName in above code in jython returns null and it never gets
> <jython>.jar on classpath as its unpacked.
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