Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/10520#issuecomment-169231145
@dilipbiswal Sorry. I do not think I understand the cause. We only set the
`instance` at
https://github.com/apache/spark/blob/master/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala#L78
(for `GenericUDFMacro`)? In most of the case, it will be null. Looks like the
equality check should not be the problem?
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