[jira] Created: (PIG-1831) Variation in output while using streaming udfs in local mode

[Vivek Padmanabhan (JIRA)]

Variation in output while using streaming udfs in local mode
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                 Key: PIG-1831
                 URL: https://issues.apache.org/jira/browse/PIG-1831
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.8.0
            Reporter: Vivek Padmanabhan


The below script when run in local mode gives me a different output. It looks 
like in local mode I have to store a relation obtained through streaming in 
order to use it afterwards.

 For example consider the below script : 
{code:lang=scala|title=} 
DEFINE MySTREAMUDF `test.sh`;

A  = LOAD 'myinput' USING PigStorage() AS (myId:chararray, data2, data3,data4 );
B = STREAM A THROUGH MySTREAMUDF AS (wId:chararray, num:int);

--STORE B into 'output.B';

C = JOIN B by wId LEFT OUTER, A by myId;
D = FOREACH C GENERATE B::wId,B::num,data4 ;
D = STREAM D THROUGH MySTREAMUDF AS (f1:chararray,f2:int);

--STORE D into 'output.D';

E = foreach B GENERATE wId,num;
F = DISTINCT E;
G = GROUP F ALL;
H = FOREACH G GENERATE COUNT_STAR(F) as TotalCount;
I = CROSS D,H;
STORE I  into 'output.I';
{code}

{code:lang=scala|title=test.sh}
#/bin/bash
cut -f1,3
{code}

And input is 
>abcd    label1  11      feature1
>acbd    label2  22      feature2
>adbc    label3  33      feature3


Here if I store relation B and D then everytime i get the result  :
acbd            3
abcd            3
adbc            3

But if i dont store relations B and D then I get an empty output.  




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