hadoop 学习计划
http://www.powerxing.com/install-hadoop-in-centos/
http://www.powerxing.com/install-hadoop-cluster/
usr/local/hadoop
http://www.cnblogs.com/yjmyzz/p/how-to-remote-debug-hadoop-with-eclipse-and-intellij-idea.html
https://www.bbsmax.com/A/rV573lNW5P/ 一般而言启动的时候总是在本地运行,而当我们在conf里面设置之后其将会自动将任务提交到远程去,此时我们即可在远端调试