Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/8499#issuecomment-135665482
I discovered this issue while trying to extend our `spark-avro` library to
publish a single artifact that is compatible with multiple Hadoop versions.
`spark-avro` itself works around these incompatibilities using the same
reflection tricks, but its tests failed due to these calls in Spark which did
not use reflection; see https://github.com/databricks/spark-avro/pull/79 for
some additional context / discussion.
I grepped to try to find all of the places that were using the
non-reflective calls, but it's possible that I might have missed a callsite or
two. I'm opening this PR now for testing + initial feedback.
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