我使用 JMeter 设置了一个分布式负载测试环境。我在我的 Windows Vista（主机）上运行 Linux 虚拟机（CentOS）。Linux VM 是 JMeter Master（客户端）。我有一台服务器（Linux CentOS），它是我的 JMeter Slave（服务器）。
我做了以下事情：
1）在客户端（主）jmeter.properties中添加了以下内容：
remote_hosts=172.22.222.22:55501 #IP address of the JMeter Slave
client.rmi.localport=55512
mode=Batch
num_sample_threshold=250
2) 在服务器（从属）jmeter.properties 中添加以下内容：
server_port=55501
server.rmi.localhostname=172.22.222.22
server.rmi.localport=55511
3）在服务器（从）jmeter-server中添加了以下内容：
RMI_HOST_DEF=-Djava.rmi.server.hostname=172.22.222.22
4）然后从我的主人那里，我做了：
ssh -R 55512:localhost:55512 172.22.222.22
5）然后我启动了jmeter服务器：
sudo ./jmeter-server
我有：
Using local port: 55511
Created remote object: UnicastServerRef [liveRef: [endpoint:[172.22.222.22:55511](local),objID:[637a4bg5:14185b4361e:-7fff, 894250217845851586]]]
6) 然后从我的主人那里，我启动了 JMeter GUI，然后运行 --> 远程启动 --> 172.22.222.22
我收到以下错误：
2013/10/04 16:03:06 ERROR - jmeter.gui.action.RemoteStart: Failed to initialise remote engine java.rmi.ConnectException: Connection refused to host: 172.22.222.22; nested exception is:
java.net.ConnectException: Connection refused
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:101)
at org.apache.jmeter.engine.ClientJMeterEngine.getEngine(ClientJMeterEngine.java:54)
at org.apache.jmeter.engine.ClientJMeterEngine.<init>(ClientJMeterEngine.java:67)
at org.apache.jmeter.gui.action.RemoteStart.doRemoteInit(RemoteStart.java:176)
at org.apache.jmeter.gui.action.RemoteStart.doAction(RemoteStart.java:79)
at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:81)
at org.apache.jmeter.gui.action.ActionRouter.access$000(ActionRouter.java:40)
at org.apache.jmeter.gui.action.ActionRouter$1.run(ActionRouter.java:63)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:688)
at java.awt.EventQueue$3.run(EventQueue.java:686)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:208)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 26 more
谁能帮我弄清楚我做错了什么，我该如何解决这个问题？我尝试在客户端和服务器上关闭 iptables，但我得到了同样的结果：
sudo service iptables stop
sudo chkconfig iptables off