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我在 hive 中使用时编写了一个 hive UDAF。它抛出 NullPointException
代码和整个任务日志粘贴在 github gist --> https://gist.github.com/hellojinjie/6750572

知道为什么它会抛出 NullPointException 吗？

或者为什么它说：
stderr logs java.lang.reflect.InvocationTargetException Continuing ... java.lang.IllegalArgumentException: Unbound variable: GenericUDAFCdnBytesLoaded$GenericUDAFCdnBytesLoadedEvaluator0 Continuing ...

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1 回答 1

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UDAT 需要扩展 AbstractGenericUDAFResolver

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

于 2013-10-31T04:01:32.080 回答