Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/15560
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GitHub user felixcheung opened a pull request:
https://github.com/apache/spark/pull/15560
[SPARKR] fix warnings
## What changes were proposed in this pull request?
Fix for a bunch of test warnings that were added recently.
We need to investigate why warnings are not turn
