Github user steveloughran commented on the issue:
https://github.com/apache/spark/pull/21066
The main barrier to this is the what-do-we-do-about-hive problem, as
without it ASF Spark doesn't run against Hadoop 3.x
It looks like "support Hive 2" is the plan there, *which is the right thing
to do long term*
short term, well, we're actually shipping this and the patched hive 1.2.x
artifacts in HDP-3.0; qualifying through our own tests, etc. I'm happy with it.
It's also worth noting that there's work ongoing in Hadoop 3.2-3.3 to add
multipart upload as an explicit API across filesystems, so you'll be able to
write committers which can use multipart upload & commit across stores.
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