[PIG-496] project of bags from complex data causes failures

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Hadoop Flags: Reviewed
• Assignee: Daniel Dai
• Reporter: Olga Natkovich
• Created: 15/Oct/08 00:37
• Updated: 04/Aug/11 00:34
• Resolved: 24/Jan/11 18:42

Description

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