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From "Pradeep Kamath (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-508) Query with a cogroup have one of its inputs coming from a group fails
Date Thu, 23 Oct 2008 22:26:46 GMT
Query with a cogroup have one of its inputs coming from a group fails
---------------------------------------------------------------------

                 Key: PIG-508
                 URL: https://issues.apache.org/jira/browse/PIG-508
             Project: Pig
          Issue Type: Bug
    Affects Versions: types_branch
            Reporter: Pradeep Kamath
            Assignee: Pradeep Kamath
             Fix For: types_branch


Script which fails:
{code}
a = load '/user/pig/tests/data/singlefile/studenttab10k';
b = group a by $0;
c = load '/user/pig/tests/data/singlefile/studenttab10k';
d = cogroup b by $0, c by $0;
e = foreach d generate group, c.$1, SUM(c.$1), COUNT(c);
dump e;
{code}

Error message produced:
{noformat}
08/10/23 15:23:54 ERROR mapReduceLayer.MapReduceLauncher: Job failed! 
08/10/23 15:23:54 ERROR mapReduceLayer.Launcher: Error message from task (reduce) task_200810231521_0007_r_000000java.lang.NullPointerException
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPackage.getNext(POPackage.java:218)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:208)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$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)
{noformat}



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