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https://issues.apache.org/jira/browse/PIG-4876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15247008#comment-15247008
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Xianda Ke commented on PIG-4876:
--------------------------------
add a testcase for this jira.
cat input.txt
{code}
1 1
1 2
1 3
2 1
2 2
2 3
3 1
3 2
3 3
{code}
test.pig
{code}
register myudfs.jar;
A = load 'input.txt' using myudfs.DummyCollectableLoader() as (c1:chararray,
c2:chararray);
B = load 'input.txt' using myudfs.DummyIndexableLoader() as (c1:chararray,
c2:chararray);
C = cogroup A by (c1,c2), B by (c1, c2) using 'merge';
D = group C by $0 using 'collected';
dump D;
E = stream C through ` awk '{ print $0 }'`;
dump E;
{code}
The expected results should be:
dump D;
{code}
((1,1),{(1,1)},{(1,1)})
((1,2),{(1,2)},{(1,2)})
((1,3),{(1,3)},{(1,3)})
((2,1),{(2,1)},{(2,1)})
((2,2),{(2,2)},{(2,2)})
((2,3),{(2,3)},{(2,3)})
((3,1),{(3,1)},{(3,1)})
((3,2),{(3,2)},{(3,2)})
((3,3),{(3,3)},{(3,3)})
{code}
dump E;
{code}
((1,1),{(1,1)},{(1,1)})
((1,2),{(1,2)},{(1,2)})
((1,3),{(1,3)},{(1,3)})
((2,1),{(2,1)},{(2,1)})
((2,2),{(2,2)},{(2,2)})
((2,3),{(2,3)},{(2,3)})
((3,1),{(3,1)},{(3,1)})
((3,2),{(3,2)},{(3,2)})
((3,3),{(3,3)},{(3,3)})
{code}
> 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
>
>
> 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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