Github user aljoscha commented on the pull request:
https://github.com/apache/flink/pull/2020
The changes look good, we just have to figure out what to do about the
methods on `StreamExecutionEnvironment`. One thing I'd like to get rid of is
`CheckpointableInputFormat.getCurrentState` returns a Tuple that contains the
split. The split is never used internally, it's only stored to return it from
this method but the read operator itself also stores the split so I think it is
redundant.
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