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https://issues.apache.org/jira/browse/PIG-995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763694#action_12763694
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Pradeep Kamath commented on PIG-995:
------------------------------------

+1

> Limit Optimizer throw exception "ERROR 2156: Error while fixing projections"
> ----------------------------------------------------------------------------
>
>                 Key: PIG-995
>                 URL: https://issues.apache.org/jira/browse/PIG-995
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.3.0
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>             Fix For: 0.6.0
>
>         Attachments: PIG-995-1.patch
>
>
> The following script fail:
> A = load '1.txt' AS (a0, a1, a2);
> B = order A by a1;
> C = limit B 10;
> D = foreach C generate $0;
> dump D;
> Error log:
> Caused by: org.apache.pig.impl.plan.VisitorException: ERROR 2156: Error while 
> fixing projections. Projection map of node to be replaced is null.
>         at 
> org.apache.pig.impl.logicalLayer.ProjectFixerUpper.visit(ProjectFixerUpper.java:138)
>         at 
> org.apache.pig.impl.logicalLayer.LOProject.visit(LOProject.java:408)
>         at org.apache.pig.impl.logicalLayer.LOProject.visit(LOProject.java:58)
>         at 
> org.apache.pig.impl.plan.DepthFirstWalker.depthFirst(DepthFirstWalker.java:65)
>         at 
> org.apache.pig.impl.plan.DepthFirstWalker.walk(DepthFirstWalker.java:50)
>         at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
>         at 
> org.apache.pig.impl.logicalLayer.LOForEach.rewire(LOForEach.java:761)

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