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
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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