Github user sachingoel0101 commented on the pull request:
https://github.com/apache/flink/pull/921#issuecomment-123390786
This leads to non-mutually exclusive splits. I tracked down the reason for
this: The input data is parallelized differently while performing the splits
for every fraction. This leads to an altogether different sequence of random
numbers, hence the problem.
@tillrohrmann, I use a seed value to initialize, as in the cross-validation
PR. Is there any way I can fix the parallelization of data, so running the
split for every fraction leads to exactly same sequence of numbers. Persist
would write the data to disk, which is something of an overhead isn't it?
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