Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/19621
@felixcheung Yes, the spark.mlp test result changed because of indexer
order changed. That's because, StringIndexer when item frequency equal, there's
no definite rule for index order. And, in this PR, I change the code logic in
StringIndexer, **but it cannot make sure to generate exactly the same indexer
order, because when item frequency equal, there's no definite rule for index
order.**
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