rmi Unknown host

[mark smith]

hi

i begin with rmi...

i tried the sun turorial
http://java.sun.com/docs/books/tutorial/rmi/index.html

now i try to run the server...
http://java.sun.com/docs/books/tutorial/rmi/running.html

java -Djava.rmi.server.codebase=file:/J:\log720\exemple_rmi\ann\public_html\classes/ -Djava.rmi.server.hostname=log-a3326-12 -Djava.security.policy=java.policy engine.ComputeEngine

i get the error

ComputeEngine exception: Unknown host: host; nested exception is:
        java.net.UnknownHostException: host
java.rmi.UnknownHostException: Unknown host: host; nested exception is:
        java.net.UnknownHostException: host
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
        at sun.rmi.server.UnicastRef.newCall(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Unknown Source)
        at engine.ComputeEngine.main(ComputeEngine.java:25)
Caused by: java.net.UnknownHostException: host
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
ource)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S

when i compiled class, i don't get any errors...

i tried to change log-a3326-12 to localhost... but i get the same error...

any idea?

[Nathan Pruett]

Change the string in the engine.ComputeEngine class at line 25 -

String name = "//host/Compute";

from "host" to your real host name.

[mark smith]

ok the server run now... it display me: ComputeEngine bound

for the client

in my folder
/home/sonia/src/client

i have ComputePi.class

in my folder
/home/sonia/public_html/classes
client
compute.jar
java.policy

in my folder
/home/sonia/public_html/classes/client
Pi.class

now i try to run the client, i get:

ComputePi exception: error unmarshalling return; nested exception is:
        java.lang.ClassNotFoundException: engine.ComputeEngine_Stub
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
        java.lang.ClassNotFoundException: engine.ComputeEngine_Stub
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Naming.java:84)
        at client.ComputePi.main(ComputePi.java:14)
Caused by: java.lang.ClassNotFoundException: engine.ComputeEngine_Stub
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:242)
        at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:430)

any idea?

the client and server are on the same host...

[Nathan Pruett]

Are you setting the classpath to find the stub before running the client?

If you're doing dynamic classloading, is the HTTP server running, and is the code at the URL the client is specifying?

[mark smith]

Originally posted by Nathan Pruett:
Are you setting the classpath to find the stub before running the client?

If you're doing dynamic classloading, is the HTTP server running, and is the code at the URL the client is specifying?

the problem was i not copied the stub on the client...
i don't understand why i need to copy it... i thinked the client download it from the server...

thanks
[ January 12, 2006: Message edited by: Marc collin ]