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https://issues.apache.org/jira/browse/PIG-4295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14517269#comment-14517269
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Xuefu Zhang commented on PIG-4295:
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I suspect that PIG-1784 might have made the cheap fix in PigContext by changing
the static variable to a thread-local variable. On the surface, PigServer
already has a reference to PigContext, so in theory each PigServer should has
its own PigContext instance. The original problem was that PigServer has static
variables. Thus, the fix should have been making them non-static. Of course
doing this could be some other complications, but making them thread-local
seemed to be a lazy fix for the problem.
[~alangates], [~rding], any insights on this?
I'd suggest investigating the original concurrent issue and proposing an
alternative fix. If so, we need to create a JIRA on trunk.
> 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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