Call From host to host:9000 failed on connection exception: java.net.ConnectE...
Call From host to host:9000 failed on connection exception: java.net.ConnectException: Connection refused;总结aboutyun123@aboutyun:/usr/hadoop-2.7.0/logs$ hadoop fs -ls -R hdfs://10.0.0.122:9000/
ls: Call From aboutyun/10.0.0.122 to aboutyun:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:http://wiki.apache.org/hadoop/ConnectionRefused
aboutyun123@aboutyun:/usr/hadoop-2.7.0/logs$ hadoop fs -ls -R hdfs://localhost:9000/
这是很多人都遇到的问题，原因如下：
1.网络原因，当然这个已经很多人总结了，比如防火墙等
2.端口配置错误
3.host不能写错
比如：你是这样配置的。
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
那么你就需要这样写，就不需要写成本机 ip地址。
hdfs访问写错只有这个命运，访问被拒绝。其它问题同理
ls: Call From aboutyun/10.0.0.122 to aboutyun:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:http://wiki.apache.org/hadoop/ConnectionRefused
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