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Mapreducer从本地计算机运行作业时出现以下错误。
Mapreducer
Null Object Cannot be converted to a value type on the following line: var result = hadoop.MapReduceJob.ExecuteJob<UserQuestionsExtractionJob>();
我在不同的hadoop项目上遇到了同样的错误,我认为mapper类中的某个地方有一个异常,所以只是在mapper方法中使用了try catch并开始工作。