我在virtualbox中下载并启动了hdp2.0，然后尝试使用yarclient从java连接

YarnClient client = YarnClient.createYarnClient();  
    client.init(new Configuration());
    client.start();
    client.createApplication();

但遇到以下错误：

1311 [IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient] DEBUG org.apache.hadoop.ipc.Client.run null – IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient: starting, having connections 1
1315 [IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient] DEBUG org.apache.hadoop.ipc.Client.close null – closing ipc connection to /192.168.0.31:8050: null
java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:392)
at org.apache.hadoop.ipc.Client$Connection.receiveRpcResponse(Client.java:955)
at org.apache.hadoop.ipc.Client$Connection.run(Client.java:852)
1319 [IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient] DEBUG org.apache.hadoop.ipc.Client.close null – IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient: closed
1320 [IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient] DEBUG org.apache.hadoop.ipc.Client.run null – IPC Client (1943692956) connection to /192.168.0.31:8050 from lordorient: stopped, remaining connections 0
1391 [main] TRACE org.apache.hadoop.ipc.ProtobufRpcEngine.invoke null – 1: Exception <- null@192.168.0.31/192.168.0.31:8050: getClusterMetrics {java.io.IOException: Failed on local exception: java.io.EOFException; Host Details : local host is: "lordorient-VirtualBox/127.0.1.1"; destination host is: "192.168.0.31":8050; }

有什么问题吗？
我使用的是来自central repo的hadoop库版本2.1.0-snapshot，这是我的yarn-site.xml

<!--Sun Jun 16 11:08:58 2013 -->
<configuration>
<property>
    <name>yarn.resourcemanager.admin.address</name>
    <value>192.168.0.31:8141</value>
</property>
<property>
    <name>yarn.resourcemanager.address</name>
    <value>192.168.0.31:8050</value>
</property>
<property>
    <name>yarn.nodemanager.address</name>
    <value>192.168.0.31:45454</value>
</property>
<property>
    <name>yarn.resourcemanager.scheduler.address</name>
    <value>192.168.0.31:8030</value>
</property>
<property>
    <name>yarn.resourcemanager.resource-tracker.address</name>
    <value>192.168.0.31:8025</value>
</property>
<property>
    <name>yarn.resourcemanager.webapp.address</name>
    <value>192.168.0.31:8088</value>
</property>
<property>
    <name>yarn.log.server.url</name>
    <value>http://192.168.0.31:19888/jobhistory/logs</value>
</property>
</configuration>

连接达到目标。只是查看了服务器日志，似乎是授权问题：

2013-08-11 12:17:34,018 INFO  ipc.Server (Server.java:doRead(763)) - IPC Server listener on 8050: readAndProcess threw exception java.io.IOException: Unable to read authentication method from client 192.168.0.48. Count of bytes read: 0
java.io.IOException: Unable to read authentication method
    at org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:1341)
    at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:758)
    at org.apache.hadoop.ipc.Server$Listener$Reader.doRunLoop(Server.java:557)
    at org.apache.hadoop.ipc.Server$Listener$Reader.run(Server.java:532)

但是所有的文档都对我应该如何配置这些安全性的东西保持沉默。有没有人对hortonworks产品有实际操作经验？