Hadoop之——Eclipse连接Hadoop / An internal error occurred during: "Map/Reduce location status updater"

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错误显示：An internal error occurred during: "Map/Reduce location status updater".

java.lang.NullPointerException

报错原因:hdfs里面没有文件，故没有任何返回值 NullPointerException

解决方法：bin/hdfs dfs -mkdir –p ~/input