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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-496) project of bags from complex data causes failures
Date Wed, 15 Oct 2008 00:38:44 GMT
project of bags from complex data causes failures
-------------------------------------------------

                 Key: PIG-496
                 URL: https://issues.apache.org/jira/browse/PIG-496
             Project: Pig
          Issue Type: Bug
            Reporter: Olga Natkovich


A = load 'complex data' as (x: bag{});
B = foreach A generate x.($1, $2);

produces stack trace:

2008-10-14 15:11:07,639 [main] ERROR org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher
- Error message from task (reduce) task_200809241441_9923_r_000000java.lang.NullPointerException
        at org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:183)
        at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:215)
        at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:166)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.runPipeline(PigMapReduce.java:252)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:222)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:134)
        at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:318)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207)

Pradeep suspects that the problem is in src/org/apache/pig/backend/hadoop/executionengine/physicalLayer/expressionOperators/POProject.java;
line 374

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