Configuration conf = new Configuration(); conf.set("fs.defaultFS", "hdfs://hadoop2cluster"); conf.set("dfs.nameservices", "hadoop2cluster"); conf.set("dfs.ha.namenodes.hadoop2cluster", "nn1,nn2"); conf.set("dfs.namenode.rpc-address.hadoop2cluster.nn1", "10.0.1.165:8020"); conf.set("dfs.namenode.rpc-address.hadoop2cluster.nn2", "10.0.1.166:8020"); conf.set("dfs.client.failover.proxy.provider.hadoop2cluster", "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider");
将其中的hadoop2cluster改为自己的HA的url
就可以了使用JAVA API获取hadoop集群的FileSystem
原文：http://www.cnblogs.com/lizhonghua34/p/6437729.html