Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/19621
@felixcheung There is no breaking change. But, we meet some trouble thing
about indeterministic behavior. When frequency equal, the indexer result is
indeterministic. I already fix those in RFormula test. But, I don't know how to
fix the sparkR `glm` test. Because it depends on R-glm library and I don't know
how to set the indexer order for R-glm library. Do you know anyone who is
familiar with this ?
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