https://www.cnblogs.com/yujianming/p/8309045.html
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Hadoop3.0中namenode的默认端口配置发生变化：从50070改为9870
Resource Manager: http://localhost:9870
JobTracker: http://localhost:8088
Specific Node Information: http://localhost:8042
Hadoop3.0 nuevas características
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Origin blog.csdn.net/qq_29232943/article/details/104139661
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