[JBoss-dev] [ jboss-Bugs-733949 ] ClassNotFoundException using HTTP invoker on bean returning

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Bugs item #733949, was opened at 2003-05-07 15:38
Message generated for change (Comment added) made by frechdachs
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Category: JBossServer
Group: v3.0 Rabbit Hole
Status: Open
Resolution: None
Priority: 5
Submitted By: Andrea Klein (frechdachs)
Assigned to: Nobody/Anonymous (nobody)
Summary: ClassNotFoundException using HTTP invoker on bean returning

Initial Comment:
I have a stateless session bean that returns a
java.util.Map (actually a HashMap)
containing an array of custom objects. When calling
this bean using the JRMI invoker
everything is working fine. When calling it using the
HTTP invoker servlet,
I get a ClassNotFoundException on the client.
As far as I could see, the class loader seems to think
that it has to load the array
class for my custom class from the file system. But why
I do not have a clue.
Furthermore this happens only if the client has not
already loaded the element class of the array, for
example catching the ClassNotFoundException and issuing
the same call again returns without any errors.

For me it looks like a bug in the serialization done in
the HTTP invoker layer.

Attached is the src jar and the ejb jar to deploy. The
client is aklein.test.client.MapTestClient
requiring the JNDI name of the bean to invoke:
aklein/test/MapTest (for JRMI),
aklein/test/MapTestHTTP ( for HTTP ).

And here is the client side out put/stack trace when
using HTTP:

creating bean from: aklein/test/MapTestHTTP
log4j:WARN No appenders could be found for logger
(org.jboss.naming.HttpNamingContextFactory).
log4j:WARN Please initialize the log4j system properly.
calling getMap:
java.lang.reflect.UndeclaredThrowableException
at $Proxy2.getMap(Unknown Source)
at
aklein.test.client.MapTestClient.main(MapTestClient.java:41)
Caused by: java.lang.ClassNotFoundException:
[Laklein.test.maptest.Content;
at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
at java.security.AccessController.doPrivileged(Native
Method)
at
java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:262)
at
org.jboss.invocation.MarshalledValueInputStream.resolveClass(MarshalledValueInputStream.java:37)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1503)
at
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1425)
at
java.io.ObjectInputStream.readArray(ObjectInputStream.java:1550)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1261)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:322)
at java.util.HashMap.readObject(HashMap.java:986)
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:324)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:809)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1733)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1636)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1264)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:322)
at
org.jboss.invocation.MarshalledValue.get(MarshalledValue.java:78)
at
org.jboss.invocation.http.interfaces.HttpInvokerProxy.invoke(HttpInvokerProxy.java:106)
at
org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:108)
at
org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:73)
at
org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:76)
at
org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:111)
at
org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
... 2 more
calling getList:
got list: [[Laklein.test.maptest.Content;@1a9334]


Thanks for any help.
Cheers, Andrea



----------------------------------------------------------------------

>Comment By: Andrea Klein (frechdachs)
Date: 2003-05-23 08:57

Message:
Logged In: YES 
user_id=773594

I found the cause: overwritten method
resolveClass(ObjectStreamClass) in
org.jboss.invocation.MarshalledValueInputStream.
Removing this method to allow the implementation of the
super class ObjectInputStream to take care of this, removes
the exception.

----------------------------------------------------------------------

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