Could not start jstatd on ubuntu server

Question

I want to setup two servers with jstatd running so I can monitoring my applications on the fly. The web server have been up and running, but another server always get some exceptions like this.

Could not bind /JStatRemoteHost to RMI Registry java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: sun.jvmstat.monitor.remote.RemoteHost (no security manager: RMI class loader disabled) at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:419) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267) at sun.rmi.transport.Transport$1.run(Transport.java:177) at sun.rmi.transport.Transport$1.run(Transport.java:174) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:173) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:273) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:251) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:377) at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source) at java.rmi.Naming.rebind(Naming.java:177) at sun.tools.jstatd.Jstatd.bind(Jstatd.java:57) at sun.tools.jstatd.Jstatd.main(Jstatd.java:143) Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: sun.jvmstat.monitor.remote.RemoteHost (no security manager: RMI class loader disabled) at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source) at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:409) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267) at sun.rmi.transport.Transport$1.run(Transport.java:177) at sun.rmi.transport.Transport$1.run(Transport.java:174) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:173) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.ClassNotFoundException: sun.jvmstat.monitor.remote.RemoteHost (no security manager: RMI class loader disabled) at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:554) at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:646) at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311) at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:263) at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1556) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1512) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) ... 13 more

I am sure jstatd loaded the policy file which content is

grant codebase "file:${java.home}/../lib/tools.jar" { permission java.security.AllPermission; };

I cannot figure whats the problem come from, please help.

Answer 1

I had the same problem as you.

As far as I understood the exception occurred on the rmi registry side because it couldn't find the class sun.jvmstat.monitor.remote.RemoteHost located inside tools.jar.

In my case the solution was to specify the java.rmi.server.codebase property when starting rmiregistry. After specifying the codebase property the problem gone. Please try to start the rmiregistry using the following command for Linux/Solaris:

rmiregistry -J-Djava.rmi.server.codebase=file:${java.home}/../lib/tools.jar &

or for Windows (though I didn't test it fully)

start rmiregistry -J-Djava.rmi.server.codebase="%JAVA_HOME%/../lib/tools.jar"

Hope it will help you.