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https://issues.apache.org/jira/browse/PIG-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615418#action_12615418
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Amir Youssefi commented on PIG-324:
-----------------------------------
Yes.
> Combiner Error
> --------------
>
> Key: PIG-324
> URL: https://issues.apache.org/jira/browse/PIG-324
> Project: Pig
> Issue Type: Bug
> Environment: Pig + Hadoop 17
> Reporter: Amir Youssefi
>
> A = load '...' USING PigStorage('\t') AS (c1, c2, c3, n1);
> B = group A by (c1,c2,c3);
> C = foreach B generate flatten(group), SUM(A.n1);
> store C into ...;
> Runs with combiner and errors out.
> java.io.IOException: For input string: "..." additional info: iteration =
> 1bag size = 2 partial sum = 0.0
> previous tupple = (...)
> at org.apache.pig.builtin.SUM.sum(SUM.java:95)
> at org.apache.pig.builtin.SUM$Final.exec(SUM.java:63)
> at org.apache.pig.builtin.SUM$Final.exec(SUM.java:60)
> at org.apache.pig.impl.eval.FuncEvalSpec$1.add(FuncEvalSpec.java:116)
> at
> org.apache.pig.impl.eval.GenerateSpec$CrossProductItem.<init>(GenerateSpec.java:159)
> at org.apache.pig.impl.eval.GenerateSpec$1.add(GenerateSpec.java:79)
> at
> org.apache.pig.backend.hadoop.executionengine.mapreduceExec.PigMapReduce.reduce(PigMapReduce.java:165)
> at
> org.apache.pig.backend.hadoop.executionengine.mapreduceExec.PigMapReduce.reduce(PigMapReduce.java:80)
> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:391)
> at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2124)
>
> Work-around was that I put out combiner:
> C = foreach B generate SUM(A.n1),flatten(group);
> and it worked. Input data has some private information in it so I cannot post
> it. Let me know if it was not possible to solve it without having it. Then we
> compile a similar input.
> c1,c2,c3 are alphabetic,
> n1 is numeric.
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