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From "Pradeep Kamath (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-508) Query with a cogroup have one of its inputs coming from a group fails
Date Fri, 24 Oct 2008 19:19:44 GMT

     [ https://issues.apache.org/jira/browse/PIG-508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pradeep Kamath updated PIG-508:
-------------------------------

    Status: Patch Available  (was: Open)

> 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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