Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/2237
`HiveConf` only means the hive jar is loaded, but doesn't mean spark is
built with hive profile enabled.
`org.apache.spark.sql.hive.HiveSessionState` is private in spark and
`org.apache.spark.sql.hive.execution.InsertIntoHiveTable` is public which mean
it should be stable and won't be removed in spark 2.x I believe.
`SparkSession.hiveClassesArePresent` is private, so I don't think it is stable.
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