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https://issues.apache.org/jira/browse/PIG-2275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13102120#comment-13102120
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Doug Daniels commented on PIG-2275:
-----------------------------------
Good catch. I changed to:
<code>
A = load 'webcrawl' USING PigStorage('\t') AS ( url: chararray, pagerank:
float, links:{ link: ( url: chararray ) } );
B = filter A by url is not null;
store B into 'output';
</code>
Same problem though, still an NPE in the same place.
> NullPointerException from ILLUSTRATE
> ------------------------------------
>
> Key: PIG-2275
> URL: https://issues.apache.org/jira/browse/PIG-2275
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.9.0
> Reporter: Doug Daniels
>
> I'm getting a NullPointerException from ILLUSTRATE on a simple script using
> the webcrawl data from the "Programming Pig" book:
> https://github.com/alanfgates/programmingpig/blob/master/data/webcrawl
> The script is:
> {code}
> A = load 'webcrawl' USING PigStorage('\t') AS ( url: chararray, pagerank:
> float, links:{ link: ( url: chararray ) } );
> B = filter A by url is not null;
> C = store B into 'output';
> {code}
> The stack trace I'm getting is:
> {code}
> java.lang.NullPointerException
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POFilter.illustratorMarkup(POFilter.java:200)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POFilter.getNext(POFilter.java:155)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:290)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POStore.getNext(POStore.java:138)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:261)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:256)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:58)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
> at
> org.apache.pig.pen.LocalMapReduceSimulator.launchPig(LocalMapReduceSimulator.java:194)
> at
> org.apache.pig.pen.ExampleGenerator.getData(ExampleGenerator.java:257)
> at
> org.apache.pig.pen.ExampleGenerator.getData(ExampleGenerator.java:238)
> at
> org.apache.pig.pen.LineageTrimmingVisitor.init(LineageTrimmingVisitor.java:103)
> at
> org.apache.pig.pen.LineageTrimmingVisitor.<init>(LineageTrimmingVisitor.java:98)
> at
> org.apache.pig.pen.ExampleGenerator.getExamples(ExampleGenerator.java:166)
> at org.apache.pig.PigServer.getExamples(PigServer.java:1258)
> at
> org.apache.pig.tools.grunt.GruntParser.processIllustrate(GruntParser.java:698)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.Illustrate(PigScriptParser.java:591)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:306)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:188)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:164)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81)
> at org.apache.pig.Main.run(Main.java:456)
> at org.apache.pig.Main.main(Main.java:108)
> {code}
> I'm running this in local mode, though I don't know if it makes a difference.
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