Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/16247
I think we should only change `spark.sql.warehouse.dir` when we are loading
SparkR as a package. This should minimize changes in the case where we are
running in cluster mode and so on.
For that purpose, let's check for R `interactive()`.
Conceptually, we might want to pass the R `tempdir()` along as a property
and then check again after config and hive config is applied, if it is still
not set, take that property and set it to `spark.sql.warehouse.dir`.
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