Github user zentol commented on the pull request: https://github.com/apache/flink/pull/202#issuecomment-71880245 i don't have a clue about all this licensing stuff. what i have seen though is that spark uses a file that has a similar license as the dill library. (https://github.com/apache/spark/blob/master/python/pyspark/cloudpickle.py)
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