Github user shivaram commented on the issue:
https://github.com/apache/spark/pull/16720
I am not sure tests are ever meant to run on a cluster (see the number of
uses of LocalSparkContext in core/src/test/scala) -- The main reason I dont
want to introduce the 'first test' approach is that we are then relying too
much on test names not clashing / getting in front of each other which seems
fragile.
The other thing that might be good is to create a test util function like
`initializeTestSparkContext` and inside that we put both the session start and
install stuff.
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