Github user tgravescs commented on the issue:
https://github.com/apache/spark/pull/18905
The recovery path returned by yarn is supposed to be reliable and if it
isn't working then the NM itself shouldn't run. So in general you should just
use that if you want spark to be able to recover. If you don't have yarn
recovery enabled them there is no need for us to write the DBs at all and I
think we should change to not do that.
I think this jira is a dup of
https://issues.apache.org/jira/browse/SPARK-17321
See my comments there.
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