Github user fhueske commented on the pull request:
https://github.com/apache/flink/pull/1553#issuecomment-185170325
Hi @ramkrish86, thanks for the update.
In addition to my comments inline we also need to extend the `ReduceITCase`.
Also we must take care of the case where the result of the partition
operator goes into more than one function. Consider the following case:
```
/--fwd--> [Reduce]
[Input] --shuffle--> [Partitioner] -<
\--fwd--> [Map]
```
which should be translated to:
```
/--fwd--> [Combine] --shuffle--> [Partitioner] --fwd--> [Reduce]
[Input] --<
\--shuffle--> [Partitioner] --fwd--> [Map]
```
Both translation tests need to be extended to cover this case.
Thanks, Fabian
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