Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/949#issuecomment-134071161
@sachingoel0101, you're right. The problem is that Flink does not give you
a guarantee in which order the elements will arrive. But this problem won't be
fixed by setting the seed for all sampling operators to the same value. There
always might be an operator, e.g. rebalance, which will completely randomize
your element order.
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