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https://issues.apache.org/jira/browse/PIG-4503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14544218#comment-14544218
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Rohini Palaniswamy commented on PIG-4503:
-----------------------------------------
Committed PIG-4503-additionalfix.patch to branch-0.15 and trunk. Thanks Daniel
for the review.
> [Pig on Tez] NPE in UnionOptimizer with multiple levels of union
> ----------------------------------------------------------------
>
> Key: PIG-4503
> URL: https://issues.apache.org/jira/browse/PIG-4503
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.14.0
> Reporter: Rohini Palaniswamy
> Assignee: Rohini Palaniswamy
> Fix For: 0.15.0
>
> Attachments: PIG-4503-1.patch, PIG-4503-additionalfix.patch
>
>
> When there are multiple levels of union, with the last union having both
> store and an output (group by,join, etc) following it then there is a NPE in
> {code}
> if (succ.isVertexGroup()
> && succ.getVertexGroupInfo().getOutput()
> .equals(succOp.getOperatorKey().toString())) {
> succOpVertexGroup = succ;
> break;
> }
> {code}
> It should check for getOutput() != null as it now has a store vertexgroup
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