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https://issues.apache.org/jira/browse/PIG-903?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Gates reassigned PIG-903:
------------------------------
Assignee: Yan Zhou
> ILLUSTRATE fails on 'Distinct' operator
> ---------------------------------------
>
> Key: PIG-903
> URL: https://issues.apache.org/jira/browse/PIG-903
> Project: Pig
> Issue Type: Bug
> Reporter: Dmitriy V. Ryaboy
> Assignee: Yan Zhou
> Fix For: 0.9.0
>
>
> Using the latest Pig from trunk (0.3+) in mapreduce mode, running through the
> tutorial script script1-hadoop.pig works fine.
> However, executing the following illustrate command throws an exception:
> illustrate ngramed2
> Pig Stack Trace
> ---------------
> ERROR 2999: Unexpected internal error. Unrecognized logical operator.
> java.lang.RuntimeException: Unrecognized logical operator.
> at
> org.apache.pig.pen.EquivalenceClasses.GetEquivalenceClasses(EquivalenceClasses.java:60)
> at
> org.apache.pig.pen.DerivedDataVisitor.evaluateOperator(DerivedDataVisitor.java:368)
> at
> org.apache.pig.pen.DerivedDataVisitor.visit(DerivedDataVisitor.java:226)
> at
> org.apache.pig.impl.logicalLayer.LODistinct.visit(LODistinct.java:104)
> at
> org.apache.pig.impl.logicalLayer.LODistinct.visit(LODistinct.java:37)
> at
> org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
> at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
> at
> org.apache.pig.pen.LineageTrimmingVisitor.init(LineageTrimmingVisitor.java:98)
> at
> org.apache.pig.pen.LineageTrimmingVisitor.<init>(LineageTrimmingVisitor.java:90)
> at
> org.apache.pig.pen.ExampleGenerator.getExamples(ExampleGenerator.java:106)
> at org.apache.pig.PigServer.getExamples(PigServer.java:724)
> at
> org.apache.pig.tools.grunt.GruntParser.processIllustrate(GruntParser.java:541)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:195)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:141)
> at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:75)
> at org.apache.pig.Main.main(Main.java:361)
> ================================================================================
> This works:
> illustrate ngramed1;
> Although it does throw a few NPEs :
> java.lang.NullPointerException
> at
> org.apache.pig.pen.util.DisplayExamples.ShortenField(DisplayExamples.java:205)
> at
> org.apache.pig.pen.util.DisplayExamples.MakeArray(DisplayExamples.java:190)
> at
> org.apache.pig.pen.util.DisplayExamples.PrintTabular(DisplayExamples.java:86)
> [...]
> (illustrate also doesn't work on bzipped input, but that's a separate issue)
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