Hive中的NullPointException UDAF

Question

在配置單元中使用它時，編寫一個配置單元UDAF。它會拋出NullPointException
代碼和整個任務日誌粘貼在github上 - >https://gist.github.com/hellojinjie/6750572

任何想法爲什麼會拋出NullPointException？

或者爲什麼它說：
stderr logs java.lang.reflect.InvocationTargetException Continuing ... java.lang.IllegalArgumentException: Unbound variable: GenericUDAFCdnBytesLoaded$GenericUDAFCdnBytesLoadedEvaluator0 Continuing ...

Answer 1

UDAT需要擴展AbstractGenericUDAFResolver

看到https://github.com/hellojinjie/hive-function/blob/d321281f67c357f50e8d3f98252c65682049da06/src/main/java/shaman/hive/udf/GenericUDAFCdnBytesLoaded.java