Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1099#issuecomment-138302904
Ah, sorry, my bad, you should take the TypeInformation fro `T` from the
call site.
You may need to manually create the type info for the tuple, from the `T`
type info, by creating a case class type info for `Tuple2` with `Long` and `T`.
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