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From Kleegrewe Christian <Christian.Kleegr...@mchp.siemens.de>
Subject java.rmi.UnmarshalException
Date Fri, 25 May 2001 08:39:06 GMT
Hi Tomcat Developers!

I have a problem using the tomcat servlet engine.
We are developing a servlet based web application. 
My Configuration is:

apache web server
tomcat servlet engine 3.2.1 
windows nt 4.0 servicepack 6a.
jdk 1.2.2 build _007

starting up tomcat seems to work fine:
----------8<----------------------------------------------------------------
Including all jars in D:\jakarta-tomcat-3.2.1\lib in your CLASSPATH.

Using CLASSPATH:
D:\jakarta-tomcat-3.2.1\classes;D:\jakarta-tomcat-3.2.1\lib\ant
.jar;D:\jakarta-tomcat-3.2.1\lib\jasper.jar;D:\jakarta-tomcat-3.2.1\lib\jaxp
.jar
;D:\jakarta-tomcat-3.2.1\lib\parser.jar;D:\jakarta-tomcat-3.2.1\lib\servlet.
jar;
D:\jakarta-tomcat-3.2.1\lib\webserver.jar;E:\kleegrewe_c\Project-Code\ic-tag
-dem
o\NegotiationEngine\web-inf\classes;c:\programme\jdk1.2.2\lib\tools.jar

2001-05-25 09:37:07 - ContextManager: Adding context Ctx( /examples )
2001-05-25 09:37:07 - ContextManager: Adding context Ctx( /admin )
2001-05-25 09:37:07 - Ctx( /ne ): Set debug to 9
2001-05-25 09:37:07 - ContextManager: Adding context Ctx( /ne )
Starting tomcat. Check logs/tomcat.log for error messages
2001-05-25 09:37:07 - ContextManager: Adding context Ctx(  )
2001-05-25 09:37:07 - ContextManager: Adding context Ctx( /test )
2001-05-25 09:37:07 - Ctx( /ne ): XmlReader - init  /ne
E:/kleegrewe_c/Project-C
ode/ic-tag-demo/NegotiationEngine
2001-05-25 09:37:07 - Ctx( /ne ): Loading -2147483646 jsp
2001-05-25 09:37:08 - PoolTcpConnector: Starting HttpConnectionHandler on
8080
2001-05-25 09:37:08 - PoolTcpConnector: Starting Ajp12ConnectionHandler on
8007
----------8<----------------------------------------------------------------
------

When I start my applicaition and request a servlet for the first time I get
the following exception

----------8<----------------------------------------------------------------
------java.rmi.UnmarshalException: error unmarshalling return; nested
exception is:
        java.lang.ClassNotFoundException: negotiation.ConnectionManager_Stub
java.lang.ClassNotFoundException: negotiation.ConnectionManager_Stub
        at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:981)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:232)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Naming.java:89)

        at
negotiation.servlet.LoginFrameServlet.init(LoginFrameServlet.java:20)

        at
org.apache.tomcat.core.ServletWrapper.doInit(ServletWrapper.java:317)

        at org.apache.tomcat.core.Handler.init(Handler.java:215)
	  .....

----------8<----------------------------------------------------------------
------

The Code in the class
negotiation.servlet.LoginFrameServlet.init(LoginFrameServlet.java:20)
is the following:

18	System.setSecurityManager(new RMISecurityManager());
19	try {
20	 cm = (ConnectionRMIInterface)Naming.lookup("//" +
Constants.SERVER_IP + ":" + Constants.RMI_PORT + "/Connection");
21	  //cm.printTest("initialization of Actualization servlet");
22	}catch (Exception e){ e.printStackTrace(); }

The value of Constants.SERVER_IP  is the ip adress of the computer where the
tomcat engine and apache and my application are running.

The Value of Constants.RMI_PORT is 2005. My connectionManager is listening
to this port.

the classpath environment variable of tomcat points to the directory where
the class that can not befound is situated in. The class
ConnaectionManager_Stub.class also exists in the proposed directory. So
where is the error?

Any help we be appreciated.

Thanks Christian Kleegrewe


-------------8<----------------------------------------------------

Christian Kleegrewe
Siemens AG:	ZT IK 6
Fon:		+49 89 636 42722
Fax:		+49 89 636 41423
em@il:	christian.kleegrewe@mchp.siemens.de

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