[jira] [Commented] (PIG-5203) Partitioner E2E test fails on spark

["Adam Szita (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-5203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15947180#comment-15947180 ] 

Adam Szita commented on PIG-5203:
---------------------------------

It seems like that in case CombinerOptimizer usage is triggered, the value of requested parallelism is not propagated correctly to the ReduceBy operator.
It is overwritten by -1 coming from the foreach operator.
Attached patch to fix this: [^PIG-5203.0.patch]
[~kellyzly] can you take a look please?

> Partitioner E2E test fails on spark
> -----------------------------------
>
>                 Key: PIG-5203
>                 URL: https://issues.apache.org/jira/browse/PIG-5203
>             Project: Pig
>          Issue Type: Sub-task
>          Components: spark
>            Reporter: Adam Szita
>            Assignee: Adam Szita
>             Fix For: spark-branch
>
>         Attachments: PIG-5203.0.patch
>
>
> Cause of failure is the difference between expected and actual result:
> {color:red}Actual:
> 18  160
> 19  164
> 20  166
> ...
> {color}{color:green}
> Expected:
> 18 80
> 18 80
> 19 82
> 19 82
> ....
> {color}
> Seems like although we specify {{PARTITION BY org.apache.pig.test.utils.SimpleCustomPartitioner2 parallel 2}} in the query it has no effect in Spark mode.



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