Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/1668#issuecomment-186174994
Great idea @senorcarbone. I also really like it :-)
I agree with @gyfora to include the logic of the
`ForwardingOneInputStreamTask` in the `StreamIterationTail`.
For the spillable state we can only use the `RocksDBStateBackend` at the
moment. But I think that is fine for a first iteration. Eventually, we'll also
add managed memory support for the memory based state backends which will make
them equally suitable for the task.
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