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https://issues.apache.org/jira/browse/PIG-995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12764119#action_12764119
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Santhosh Srinivasan commented on PIG-995:
-----------------------------------------
Review comments:
The initialization code is fine. However, the try catch block is shared between
the rebuildSchemas() and rebuildProjectionMaps() method invocation. This could
lead to misleading error message. Specifically, if the rebuildSchemas() throws
an exception then the error message will indicate that rebuilding projection
maps failed.
> 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, PIG-995-2.patch, PIG-995-3.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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