Github user maropu commented on the pull request:

    https://github.com/apache/spark/pull/5383#issuecomment-91172886
  
    I found one issue; the current implementation of HiveGenericUdtf always 
calls `terminate()` though, it does not call `initialize()` in some cases 
because of lazy initialization.
    
    ```
     protected lazy val outputInspector = 
function.initialize(inputInspectors.toArray)
    ```


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