Github user senorcarbone commented on the issue:
Hey! In this upcoming [PR ](https://github.com/apache/flink/pull/1668)
there is a custom operator responsible for the logging at the iteration head.
Hope this does not break your tests in case they assume a null op.
Also, in case any of you is familiar with asynchronous checkpoints with
ListState, could you check my last question in the same PR? thanks :)
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