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https://issues.apache.org/jira/browse/PIG-4276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14500854#comment-14500854
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Mohit Sabharwal commented on PIG-4276:
--------------------------------------
FYI [~kellyzly] and [~praveenr019], please take a look at the patch.
Spark {{groupByKey}}, {{reduceByKey}} and {{CoGroupRDD}} return tuples not
sorted by key in Spark (unlike MR).
Note that {{reduceByKey}} is used by DISTINCT operator in Spark engine.
Where possible, patch uses {{Util.checkQueryOutputsAfterSort}}. In other
places, the patch introduces an {{ORDER BY}} command to sort the GROUP BY or
DISTINCT output.
> Fix ordering related failures in TestEvalPipeline for Spark
> -----------------------------------------------------------
>
> Key: PIG-4276
> URL: https://issues.apache.org/jira/browse/PIG-4276
> Project: Pig
> Issue Type: Sub-task
> Components: spark
> Reporter: liyunzhang_intel
> Assignee: Mohit Sabharwal
> Fix For: spark-branch
>
> Attachments: PIG-4276.patch,
> TEST-org.apache.pig.test.TestEvalPipeline.txt
>
>
> error log is attached
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