Github user goungoun commented on the issue:
https://github.com/apache/spark/pull/20800
@rxin, checking empty is likely to be a common process in every ETL batch
job. I think it is the right place to provide that functionality. When a basic
function is missing already supposed to be provided, people spend unnecessary
time for searching and creating their own creative functions. It does not help
us develop clean code or business value neither. I added one of the
stack-overflow discussions at SPARK-23627 for your reference. I also would like
to confirm rdd.isEmpty is optimized internally following up this issue.
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