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https://issues.apache.org/jira/browse/PIG-4876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255821#comment-15255821
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Xianda Ke commented on PIG-4876:
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I think your proposal is similar with the solution in PIG-4842
([PIG-4842-2.patch|https://issues.apache.org/jira/secure/attachment/12795373/PIG-4842-2.patch])
and PIG-4857(
[PIG-4857.patch|https://issues.apache.org/jira/secure/attachment/12795997/PIG-4857.patch]),
which just reset the flag and does not touch non-spark code.
it should work if we refactor the code by implementing the abstract method(like
beginOfInput()).
Yes, it minimize non-spark code change, but it seem a bit tricky.
> OutputConsumeIterator can't handle the last buffered tuples for some Operators
> ------------------------------------------------------------------------------
>
> Key: PIG-4876
> URL: https://issues.apache.org/jira/browse/PIG-4876
> Project: Pig
> Issue Type: Sub-task
> Components: spark
> Reporter: Xianda Ke
> Assignee: Xianda Ke
> Fix For: spark-branch
>
> Attachments: PIG-4876.patch
>
>
> Some Operators, such as MergeCogroup, Stream, CollectedGroup etc buffer some
> input records to constitute the result tuples. The last result tuples are
> buffered in the operator. These Operators need a flag to indicate the end of
> input, so that they can flush and constitute their last tuples.
> Currently, the flag 'parentPlan.endOfAllInput' is targeted for flushing the
> buffered tuples in MR mode. But it does not work with OutputConsumeIterator
> in Spark mode.
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