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https://issues.apache.org/jira/browse/PIG-2660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262173#comment-13262173
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Dmitriy V. Ryaboy commented on PIG-2660:
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I tried to find users of the PPNL interface earlier, and none were to be had
(Oozie is a potential one, but they said they don't use it). There are a number
of changes to this interface we want to put into 0.11, they will be documented
appropriately.
Oozie asked that we implement an abstract PPNL for future-proofing, which I
thought I did.. but now can't find. Outstanding jira?
> PPNL should get notified of plan before it gets executed
> --------------------------------------------------------
>
> Key: PIG-2660
> URL: https://issues.apache.org/jira/browse/PIG-2660
> Project: Pig
> Issue Type: New Feature
> Reporter: Bill Graham
> Assignee: Bill Graham
> Attachments: PIG-2660.1.patch, PIG-2660.2.patch
>
>
> The {{PigProgressNotificationListner}} should get notified of the plan
> ({{MROperPlan}}) before it gets executed. This allows listeners to inspect
> the plan and have an idea what to expect in the execution flow. Proposal is
> to add the following method to the PPNL interface, which is marked as
> evolving:
> {code}
> public void initialPlanNotification(MROperPlan plan);
> {code}
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