Github user freeman-lab commented on the pull request:
https://github.com/apache/spark/pull/1361#issuecomment-49344174
Looks like the basic test for correct final params passes, but not the
stricter test for improvement on every update. Both pass locally. My guess is
that it's running a bit slower on Jenkins, so the updates don't complete fast
enough (I can create a failure locally by making the test data rate too high).
I'll play with this, might work to just slow down the data rate.
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