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https://issues.apache.org/jira/browse/PIG-4295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14516227#comment-14516227
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Mohit Sabharwal commented on PIG-4295:
--------------------------------------

Thanks, [~kellyzly]. Looks like PIG-1874 made PigContext#packageImportList 
thread local to support concurrent PigServers running in separate threads. I'm 
afraid we are breaking that functionality by reverting to a static variable. 

Also, I don't think I understand the issue very clearly here. Do you know why 
this not a problem when we use MR engine ?

> Enable unit test "TestPigContext" for spark
> -------------------------------------------
>
>                 Key: PIG-4295
>                 URL: https://issues.apache.org/jira/browse/PIG-4295
>             Project: Pig
>          Issue Type: Sub-task
>          Components: spark
>            Reporter: liyunzhang_intel
>            Assignee: liyunzhang_intel
>             Fix For: spark-branch
>
>         Attachments: PIG-4295.patch, 
> TEST-org.apache.pig.test.TestPigContext.txt
>
>
> error log is attached



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