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Posted to dev@pig.apache.org by "Anand L Ranganathan (JIRA)" <ji...@apache.org> on 2012/08/28 05:05:07 UTC
[jira] [Updated] (PIG-1283) COUNT on null bag causes failure
[ https://issues.apache.org/jira/browse/PIG-1283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anand L Ranganathan updated PIG-1283:
-------------------------------------
Status: In Progress (was: Patch Available)
Working.
> COUNT on null bag causes failure
> --------------------------------
>
> Key: PIG-1283
> URL: https://issues.apache.org/jira/browse/PIG-1283
> Project: Pig
> Issue Type: Bug
> Components: impl
> Reporter: Thejas M Nair
> Assignee: Anand L Ranganathan
> Labels: newbie
> Attachments: PIG-1283-1.patch
>
>
> grunt> l = load '/tmp/e.bag' as (b : bag{t: (i : int)}, a : int);
> # b is null for the only row
> grunt> c = foreach l generate COUNT(b);
> grunt> dump c
> It results in following exception-
> org.apache.pig.backend.executionengine.ExecException: ERROR 2106: Error while computing count in COUNT
> at org.apache.pig.builtin.COUNT.exec(COUNT.java:59)
> at org.apache.pig.builtin.COUNT.exec(COUNT.java:39)
> at org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:212)
> at org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:293)
> at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:358)
> at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:288)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:232)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:227)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:52)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:583)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
> at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:176)
> Caused by: java.lang.NullPointerException
> at org.apache.pig.builtin.COUNT.exec(COUNT.java:46)
> ... 12 more
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