When I use Jmeter3.3 to excuse Distributed stress testing，I can't connect to the remote server

Question

java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused: connect at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source) ~[?:1.8.0_111] at sun.rmi.server.UnicastRef.newCall(Unknown Source) ~[?:1.8.0_111] at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source) ~[?:1.8.0_111] at java.rmi.Naming.lookup(Unknown Source) ~[?:1.8.0_111] at org.apache.jmeter.engine.ClientJMeterEngine.getEngine(ClientJMeterEngine.java:54) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.ClientJMeterEngine.(ClientJMeterEngine.java:67) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.DistributedRunner.createEngine(DistributedRunner.java:237) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.DistributedRunner.getClientEngine(DistributedRunner.java:213) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.DistributedRunner.init(DistributedRunner.java:93) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.gui.action.RemoteStart.doAction(RemoteStart.java:86) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:80) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.gui.action.ActionRouter.lambda$actionPerformed$0(ActionRouter.java:65) ~[ApacheJMeter_core.jar:3.3 r1808647] at java.awt.event.InvocationEvent.dispatch(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue.dispatchEventImpl(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue.access$500(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_111] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_111] at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue.dispatchEvent(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_111] Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) ~[?:1.8.0_111] at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) ~[?:1.8.0_111] at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[?:1.8.0_111] at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[?:1.8.0_111] at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_111] at java.net.PlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_111] at java.net.SocksSocketImpl.connect(Unknown Source) ~[?:1.8.0_111] at java.net.Socket.connect(Unknown Source) ~[?:1.8.0_111] at java.net.Socket.connect(Unknown Source) ~[?:1.8.0_111] at java.net.Socket.(Unknown Source) ~[?:1.8.0_111] at java.net.Socket.(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown Source) ~[?:1.8.0_111] ... 28 more 2017-11-28 20:12:51,444 INFO o.a.j.e.DistributedRunner: Failed to configure localhost 2017-11-28 20:12:51,444 INFO o.a.j.e.DistributedRunner: Configuring remote engine: 192.168.20.16 2017-11-28 20:12:51,528 INFO o.a.j.e.DistributedRunner: Configuring remote engine: 192.168.20.142 2017-11-28 20:12:54,604 INFO o.a.j.e.DistributedRunner: Configuring remote engine: 192.168.20.57 2017-11-28 20:12:54,711 INFO o.a.j.e.DistributedRunner: Stopping remote engines 2017-11-28 20:12:54,711 INFO o.a.j.e.ClientJMeterEngine: about to stop remote test on 192.168.20.57 2017-11-28 20:12:54,745 ERROR o.a.j.e.ClientJMeterEngine: java.lang.NullPointerException: null at org.apache.jmeter.engine.RemoteJMeterEngineImpl.rstopTest(RemoteJMeterEngineImpl.java:198) ~[ApacheJMeter_core.jar:3.3 r1808647] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_111] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_111] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_111] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_111] at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.Transport$1.run(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.Transport$1.run(Unknown Source) ~[?:1.8.0_111] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_111] at sun.rmi.transport.Transport.serviceCall(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source) ~[?:1.8.0_111] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_111] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source) ~[?:1.8.0_111] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[?:1.8.0_111] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[?:1.8.0_111] at java.lang.Thread.run(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source) ~[?:1.8.0_111] at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source) ~[?:1.8.0_111] at sun.rmi.server.UnicastRef.invoke(Unknown Source) ~[?:1.8.0_111] at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source) ~[?:1.8.0_111] at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source) ~[?:1.8.0_111] at com.sun.proxy.$Proxy21.rstopTest(Unknown Source) ~[?:?] at org.apache.jmeter.engine.ClientJMeterEngine.stopTest(ClientJMeterEngine.java:84) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.DistributedRunner.stop(DistributedRunner.java:157) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.DistributedRunner.stop(DistributedRunner.java:174) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.engine.DistributedRunner.init(DistributedRunner.java:111) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.gui.action.RemoteStart.doAction(RemoteStart.java:86) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:80) ~[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.gui.action.ActionRouter.lambda$actionPerformed$0(ActionRouter.java:65) ~[ApacheJMeter_core.jar:3.3 r1808647] at java.awt.event.InvocationEvent.dispatch(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue.dispatchEventImpl(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue.access$500(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue$3.run(Unknown Source) [?:1.8.0_111] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_111] at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) [?:1.8.0_111] at java.awt.EventQueue.dispatchEvent(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_111] at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_111] 2017-11-28 20:12:54,745 INFO o.a.j.e.ClientJMeterEngine: about to stop remote test on 192.168.20.142

Answer 1

1. Make sure you define java.rmi.server.hostname and server_port system properties either via -D command-line argument or by putting the appropriate values into system.properties file.
2. Make sure that port 1099 is open and you can reach JMeter server from the slaves and vice versa using telnet or equivalent
3. Enable logging on JMeter slaves by passing the desired log file name and path via -j command-line argument

If nothing help - update your question including all the defined properties, command lines to start server and slaves and log files.

References:

• java.rmi Properties
• JMeter Distributed Testing Step-by-step
• How to Perform Distributed Testing in JMeter