Configuration config = new Configuration();
        String nameservices = context.getString("hdfs.nameservice","ns1");
        String namenodes = context.getString("hdfs.namenodes");
        String namenode1 = context.getString("hdfs.namenode1");
        String namenode2 = context.getString("hdfs.namenode2");

        config.set("fs.defaultFS", "hdfs://"+nameservices);
        config.set("dfs.nameservices", nameservices);
        config.set("dfs.ha.namenodes." + nameservices, namenodes);
        String[] nns=namenodes.split(",");
        if(nns.length>=2){
            config.set("dfs.namenode.rpc-address."+nameservices+"."+nns[0], namenode1);
            config.set("dfs.namenode.rpc-address."+nameservices+"."+nns[1], namenode2);
        }

        //conf.setBoolean(name, value);
        config.set("dfs.client.failover.proxy.provider."+nameservices, "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider");