Github user liancheng commented on the pull request: https://github.com/apache/spark/pull/8368#issuecomment-133711273 This can be tested using `HiveThriftJdbcTest.withMultipleConnectionJdbcStatement()`. This method accepts zero or more `Statement => Unit` functions, and runs them within different JDBC sessions. Although these functions are executed sequentially, all the connections are established at the beginning, so different function are guaranteed to be executed in different thread.
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