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Posted to dev@pig.apache.org by "Richard Ding (JIRA)" <ji...@apache.org> on 2009/10/28 00:52:59 UTC
[jira] Assigned: (PIG-746) Works in --exectype local, fails on grid
- ERROR 2113: SingleTupleBag should never be serialized
[ https://issues.apache.org/jira/browse/PIG-746?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Richard Ding reassigned PIG-746:
--------------------------------
Assignee: Richard Ding
> Works in --exectype local, fails on grid - ERROR 2113: SingleTupleBag should never be serialized
> ------------------------------------------------------------------------------------------------
>
> Key: PIG-746
> URL: https://issues.apache.org/jira/browse/PIG-746
> Project: Pig
> Issue Type: Bug
> Reporter: David Ciemiewicz
> Assignee: Richard Ding
>
> The script below works on Pig 2.0 local mode but fails when I run the same program on the grid.
> I was attempting to create a workaround for PIG-710.
> Here's the error:
> {code}
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2113: SingleTupleBag should never be serialized
> or serialized.
> at org.apache.pig.data.SingleTupleBag.write(SingleTupleBag.java:129)
> at org.apache.pig.data.DataReaderWriter.writeDatum(DataReaderWriter.java:147)
> at org.apache.pig.data.DefaultTuple.write(DefaultTuple.java:291)
> at org.apache.pig.impl.io.PigNullableWritable.write(PigNullableWritable.java:83)
> at
> org.apache.hadoop.io.serializer.WritableSerialization$WritableSerializer.serialize(WritableSerialization.java:90)
> at
> org.apache.hadoop.io.serializer.WritableSerialization$WritableSerializer.serialize(WritableSerialization.java:77)
> at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:439)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.collect(PigMapReduce.java:101)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:219)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:208)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:86)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:227)
> {code}
> Here's the program:
> {code}
> A = load 'filterbug.data' using PigStorage() as ( id, str );
> A = foreach A generate
> id,
> str,
> (
> str matches 'hello' or
> str matches 'hello'
> ? 1 : 0
> ) as matched;
> describe A;
> B = group A by ( id );
> describe B;
> D = foreach B generate
> group,
> SUM(A.matched) as matchedcount,
> A;
> describe D;
> E = filter D by matchedcount > 0;
> describe E;
> F = foreach E generate
> FLATTEN(A);
> describe F;
> dump F;
> {code}
> Here's the data filterbug.data
> {code}
> a hello
> a goodbye
> b goodbye
> c hello
> c hello
> c hello
> e what
> {code}
>
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