Github user jkbradley commented on the issue: https://github.com/apache/spark/pull/15874 @Yunni Thanks for the updates! I don't think we should include AND-amplification for 2.1 since we're already in QA. But it'd be nice to get it in 2.2. Also, 2.2 will give us plenty of time to discuss distributed approxNearestNeighbors. FYI: I asked around about the managed memory leak warning/failure. It is usually just a warning, but some test suites are set to fail upon seeing that warning. That was apparently useful for debugging some memory leak bugs but is not cause to worry. I recommend we make tests small enough to avoid them for now. If the warning becomes an issue, we could configure ML suites to ignore the warning, or we could even downgrade the warning to a lower-priority log message for all of Spark. This LGTM. What does everyone think? For 2.1, the main thing I'd still like to do is to send a PR to clarify terminology. That could be done in [https://github.com/apache/spark/pull/15795]
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