Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/3121#issuecomment-62076608
@aarondav I just noticed another test failure which was due to the same
problem that you saw in #3053: some of our tests throw exceptions when creating
SparkContexts and then never clean up those resources, which triggers the
"cannot create a new SparkContext if a previous attempt failed" limitation that
this commit introduces.
I'd rather not refactor a bunch of test code in SQL, so I'm probably going
to just add the "turn this error into a warning" flag to our test Java options;
we can do the final cleanup / refactoring later.
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