在hdfs创建目录时遇到的连接问题

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17/09/07 20:32:38 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
mkdir: Call From Ubuntu1/192.168.1.170 to Ubuntu1:9000 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

原因是没有启动集群,启动后就能正常创建了

启动集群:./sbin/start-dfs.sh

再执行创建目录:
hduser@Ubuntu1:~/hadoop$ ./bin/hadoop fs -mkdir /filename
17/09/07 20:38:58 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable

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