Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/8314#issuecomment-151188571
For `JavaDataFrameSuite.testSampleBy` I think you can accept any value
between 1 and 6 for key 0, and 4 and 9 for key 1. These are not-improbable
values given the test -- basically, how many of 33 elements do you choose if
choosing with probability 0.1 and 0.2 respectively.
The `Word2Vec` test does look far too tight, I think. The others, I'm not
as sure. I think the `StreamingKMeansSuite` just needs more points. Let me see
if I can provide a concrete suggestion on these.
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