java代码连接hadoop FileSystem 连接hdfs报错:Connection refused: no further information
确保应用正常启动、JPS该起的进程都要启动的情况下,用java接连hdfs做文件上传报如下错误:
java.net.ConnectException: Call From USER-20150505FN/192.168.1.115 to www.danpinshop.com:9000 failed on connection exception: java.net.ConnectException: Connection refused: no further information; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:783)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:730)
at org.apache.hadoop.ipc.Client.call(Client.java:1351)
at org.apache.hadoop.ipc.Client.call(Client.java:1300)
解决办法:
1.可能是权限问题
在hdfs-site.xml文件里添加
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
2.core-site.xml配置的fs.defaultFS,原来配置的hdfs://localhost:9000更改为机器ip。
灵感来自于: