I encountered problem when a session bean returns a collection of object or even an object instance if the session bean method (for example find) is called by a servlet residing in another server. This probelm did not appear when the servlet is deployed in the web container in JBOSS AS. The exception error is "java.lang.reflect.UndeclaredThrowableException".

The console display the following message:

at $Proxy119.getAccounts1(Unknown Source)
at org.apache.jsp.accountsetup_jsp._jspService(org.apache.jsp.accountset
up_jsp:139)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
14)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrinc
ipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:153)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWor
kerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
09:15:41,843 ERROR [SocketClientInvoker] Got marshalling exception, exiting
java.lang.ClassNotFoundException: No ClassLoaders found for: example.bean.entity
.AccountDetails
at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:292)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryCl
assLoader.java:475)
at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassL
oader.java:377)
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 java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:574)
at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.resolveCl
ass(ObjectInputStreamWithClassLoader.java:102)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:153
8)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at java.util.ArrayList.readObject(ArrayList.java:592)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919
)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1813)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.aop.joinpoint.InvocationResponse.readExternal(InvocationRes
ponse.java:107)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:175
3)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:19
12)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read
(SerializableUnMarshaller.java:72)
at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(Soc
ketClientInvoker.java:244)
at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.jav
a:117)
at org.jboss.remoting.Client.invoke(Client.java:201)
at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemot
eInterceptor.java:41)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPr
opagationInterceptor.java:46)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityC
lientInterceptor.java:40)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.aspects.remoting.IsLocalInterceptor.invoke(IsLocalIntercept
or.java:34)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteP
roxy.java:79)
at $Proxy119.getAccounts1(Unknown Source)
at org.apache.jsp.accountsetup_jsp._jspService(org.apache.jsp.accountset
up_jsp:139)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
14)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrinc
ipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:153)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWor
kerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
09:15:41,859 ERROR [SocketClientInvoker] Error loading classes from remote call
result.
java.lang.ClassNotFoundException: No ClassLoaders found for: example.bean.entity
.AccountDetails
at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:292)
at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryCl
assLoader.java:475)
at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassL
oader.java:377)
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 java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:574)
at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.resolveCl
ass(ObjectInputStreamWithClassLoader.java:102)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:153
8)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at java.util.ArrayList.readObject(ArrayList.java:592)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919
)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1813)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.aop.joinpoint.InvocationResponse.readExternal(InvocationRes
ponse.java:107)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:175
3)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:19
12)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read
(SerializableUnMarshaller.java:72)
at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(Soc
ketClientInvoker.java:244)
at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.jav
a:117)
at org.jboss.remoting.Client.invoke(Client.java:201)
at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemot
eInterceptor.java:41)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPr
opagationInterceptor.java:46)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityC
lientInterceptor.java:40)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.aspects.remoting.IsLocalInterceptor.invoke(IsLocalIntercept
or.java:34)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.
java:88)
at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteP
roxy.java:79)
at $Proxy119.getAccounts1(Unknown Source)
at org.apache.jsp.accountsetup_jsp._jspService(org.apache.jsp.accountset
up_jsp:139)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
14)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrinc
ipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:153)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWor
kerThread.java:112)
at java.lang.Thread.run(Thread.java:595)