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From "Xu Zhang (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-173) NullPointerException when running my Pig script with streaming
Date Fri, 28 Mar 2008 22:52:26 GMT
NullPointerException when running my Pig script with streaming

                 Key: PIG-173
                 URL: https://issues.apache.org/jira/browse/PIG-173
             Project: Pig
          Issue Type: Bug
            Reporter: Xu Zhang
            Assignee: Arun C Murthy
            Priority: Critical

Execute the following Pig statements in Grunt or with a Pig script, and a NullPointerException
is generated.

grunt> A = load '/user/pig/tests/data/singlefile/studentcolon10k' using PigStorage(':');
grunt> B = foreach A generate $2, $1, $0;
grunt> define X `awk 'BEGIN {FS = ","; OFS = "\t"} {print $3, $2, $1}'` input (stdin using
grunt> C = stream B through X;
grunt> D = foreach C generate $0, $1;
2008-03-28 14:17:20,978 [main] ERROR org.apache.pig.tools.grunt.GruntParser - java.lang.NullPointerException
        at org.apache.pig.impl.logicalLayer.LOEval.outputSchema(LOEval.java:69)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:1508)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:691)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:492)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:342)
        at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:47)
        at org.apache.pig.PigServer.registerQuery(PigServer.java:261)
        at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:462)
        at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:226)
        at org.apache.pig.tools.grunt.GruntParser.parseContOnError(GruntParser.java:73)
        at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:54)
        at org.apache.pig.Main.main(Main.java:253)

2008-03-28 14:17:20,979 [main] ERROR org.apache.pig.tools.grunt.GruntParser - java.lang.NullPointerException

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