[jira] Commented: (PIG-240) Support launching concurrent Pig jobs from one VM

["Alan Gates (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12732148#action_12732148 ] 

Alan Gates commented on PIG-240:
--------------------------------

Jeff,

It looks tome like we don't want to share LogicalPlanCloneHelper across threads.  Instead, there should be one instance per job.  Otherwise separate jobs may mingle their logical plan maps.  If we instead had a shared container that tracked LogicalPlanCloneHelper by thread id and then change LogicalPlan and LogicalPlanCloneHelper to fetch the right map, this should work.

> Support launching concurrent Pig jobs from one VM
> -------------------------------------------------
>
>                 Key: PIG-240
>                 URL: https://issues.apache.org/jira/browse/PIG-240
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>            Reporter: Tom White
>            Assignee: Jeff Zhang
>         Attachments: patch_240.txt, pig-240.patch
>
>
> For some applications it would be convenient to launch concurrent Pig jobs from a single VM. This is currently not possible since Pig has static mutable state.

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