Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/372#issuecomment-95583993
@StephanEwen Don't think printing on the client can be worse if the output
still contains information about the producers (e.g. by a task id). IMO, a sink
identifier could still make sense when you make multiple calls to print and
want to distinguish easily between the outputs.
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