proactive.hostname does not work on a NAT environment #547
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Original comment posted by Clement Mathieu on 15, May 2009 at 11:11 AM RMI does not support NAT and invalid proactive.hostname usage -> closing as invalid proactive.hostname can be used to set the name of the local runtime when proactive.net.(interface|netmask|nolocal|noprivate) do not work. Usually, it is used to set a FQDN as hostname that can be resolved from the outside of the LAN. Since your machine and your router are two distinct hosts, it is obvious that it cannot work. |
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Original comment posted by Florin Bratu on 15, May 2009 at 11:36 AM
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Original comment posted by Clement Mathieu on 15, May 2009 at 14:22 PM
Yes. Reading is not sufficient, you have to understand the manual. Feel free to propose a solution to bypass NAT with java.rmi.server.hostname. Your contribution is welcome.
Do you understand what multihomed stands form and what is a router ?
You can set proactive.hostname to "www.google.com" if you want. But do not complain it does not work. The IP address of the router is not local, it will not work.
It is not a contradiction, you should read more carefully the documentation. You can use proactive.hostname with an hostname or an IP address. Usually you use it with an FQDN which can be resolved by all the machines involved in the computation (usually a CNAME record). Since proactive.net.* properties are easier to use, it is unusual to set proactive.hostname to an IP address. I will not respond anymore to this bug report. The value of proactive.hostname must resolve to the local machine. |
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Original comment posted by Florin Bratu on 15, May 2009 at 14:41 PM
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Original issue created by Florin Bratu on 14, May 2009 at 20:04 PM - PROACTIVE-666
I have an active object that runs on a remote host, and a machine which is behind a router that uses NAT. I am trying to lookup the active object from the local machine and execute a method on it. ProActive fails to work on this configuration:
If I don't use proactive.hostname, then the "internal" address 192.168.0.4 will be elected. See 2
If I set -Dproactive.hostname=192.168.0.4, then on the remote host the active object will process the method, but when it wants to send back the reply it reports the following exception:
(link: AO.BodyImpl$ActiveLocalBodyStrategy.serveInternal) Connection refused to host: 192.168.0.4; nested exception is:
java.net.ConnectException: Connection timed out
java.rmi.ConnectException: Connection refused to host: 192.168.0.4; nested exception is:
java.net.ConnectException: Connection timed out
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110)
at org.objectweb.proactive.core.remoteobject.rmi.RmiRemoteObjectImpl_Stub.receiveMessage(Unknown Source)
at org.objectweb.proactive.core.remoteobject.RemoteObjectAdapter.receiveMessage(RemoteObjectAdapter.java:169)
at org.objectweb.proactive.core.remoteobject.SynchronousProxy.reify(SynchronousProxy.java:77)
at pa.stub.org.objectweb.proactive.core.body._StubUniversalBody.receiveReply(_StubUniversalBody.java)
at org.objectweb.proactive.core.body.UniversalBodyRemoteObjectAdapter.receiveReply(UniversalBodyRemoteObjectAdapter.java:173)
at org.objectweb.proactive.core.body.reply.ReplyImpl.send(ReplyImpl.java:150)
at org.objectweb.proactive.core.body.BodyImpl$ActiveLocalBodyStrategy.serveInternal(BodyImpl.java:621)
at org.objectweb.proactive.core.body.BodyImpl$ActiveLocalBodyStrategy.serve(BodyImpl.java:525)
at org.objectweb.proactive.core.body.AbstractBody.serve(AbstractBody.java:922)
at org.objectweb.proactive.Service.blockingServeOldest(Service.java:175)
at org.objectweb.proactive.Service.blockingServeOldest(Service.java:150)
at org.objectweb.proactive.Service.fifoServing(Service.java:126)
at org.objectweb.proactive.core.body.ActiveBody$FIFORunActive.runActivity(ActiveBody.java:317)
at org.objectweb.proactive.core.body.ActiveBody.run(ActiveBody.java:197)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.ConnectException: Connection timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:518)
at java.net.Socket.connect(Socket.java:468)
at java.net.Socket.(Socket.java:365)
at java.net.Socket.(Socket.java:179)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
... 18 more
This is normal: 192.168.0.4 is not visible outside...
If I set -Dproactive.hostname=(link: router_IP), then the RMI registry created by ProActive is unable to do object bindings:
(link: DEBUG oactive.remoteobject AbstractRmiRemoteObjectFactory) cannot bind object at rmi://(link: router_IP)8080/PA_JVM1899355203
org.objectweb.proactive.core.ProActiveException: Failed to create remote object (name=PA_JVM1899355203)
at org.objectweb.proactive.core.remoteobject.RemoteObjectExposer.createRemoteObject(RemoteObjectExposer.java:160)
at org.objectweb.proactive.core.runtime.ProActiveRuntimeImpl.(ProActiveRuntimeImpl.java:274)
at org.objectweb.proactive.core.runtime.ProActiveRuntimeImpl.(ProActiveRuntimeImpl.java:163)
at org.objectweb.proactive.core.remoteobject.AbstractRemoteObjectFactory.addCodebase(AbstractRemoteObjectFactory.java:64)
at org.objectweb.proactive.core.remoteobject.AbstractRemoteObjectFactory.createClassServer(AbstractRemoteObjectFactory.java:83)
at org.objectweb.proactive.core.remoteobject.AbstractRemoteObjectFactory.(AbstractRemoteObjectFactory.java:52)
at org.objectweb.proactive.core.remoteobject.RemoteObjectHelper.getRemoteObjectFactory(RemoteObjectHelper.java:110)
at org.objectweb.proactive.core.remoteobject.RemoteObjectHelper.getFactoryFromURL(RemoteObjectHelper.java:120)
at org.objectweb.proactive.core.remoteobject.RemoteObjectHelper.lookup(RemoteObjectHelper.java:161)
at org.objectweb.proactive.api.PAActiveObject.lookupActive(PAActiveObject.java:1244)
at org.ow2.proactive.authentication.Connection.lookupAuthentication(Connection.java:86)
at org.ow2.proactive.authentication.Connection.connect(Connection.java:97)
at org.ow2.proactive.resourcemanager.frontend.RMConnection.join(RMConnection.java:84)
at org.ow2.proactive.resourcemanager.gui.data.RMStore.(RMStore.java:93)
at org.ow2.proactive.resourcemanager.gui.data.RMStore.newInstance(RMStore.java:132)
at org.ow2.proactive.resourcemanager.gui.handlers.ConnectHandler.execute(ConnectHandler.java:69)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:281)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
at org.eclipse.ui.menus.CommandContributionItem.handleWidgetSelection(CommandContributionItem.java:619)
at org.eclipse.ui.menus.CommandContributionItem.access$10(CommandContributionItem.java:605)
at org.eclipse.ui.menus.CommandContributionItem$4.handleEvent(CommandContributionItem.java:595)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1158)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3401)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3033)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.ow2.proactive.resourcemanager.Application.start(Application.java:59)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:382)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
Caused by: org.objectweb.proactive.core.ProActiveException: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.AccessException: Registry.Registry.rebind disallowed; origin /192.168.0.254 is non-local host
at org.objectweb.proactive.core.remoteobject.rmi.AbstractRmiRemoteObjectFactory.register(AbstractRmiRemoteObjectFactory.java:176)
at org.objectweb.proactive.core.remoteobject.rmi.AbstractRmiRemoteObjectFactory.createRemoteObject(AbstractRmiRemoteObjectFactory.java:263)
at org.objectweb.proactive.core.remoteobject.RemoteObjectExposer.createRemoteObject(RemoteObjectExposer.java:156)
... 49 more
Caused by: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.AccessException: Registry.Registry.rebind disallowed; origin /192.168.0.254 is non-local host
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Naming.java:160)
at org.objectweb.proactive.core.remoteobject.rmi.AbstractRmiRemoteObjectFactory.register(AbstractRmiRemoteObjectFactory.java:164)
... 51 more
Caused by: java.rmi.AccessException: Registry.Registry.rebind disallowed; origin /192.168.0.254 is non-local host
at sun.rmi.registry.RegistryImpl.checkAccess(RegistryImpl.java:228)
at sun.rmi.registry.RegistryImpl.rebind(RegistryImpl.java:152)
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
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