Remote exceptions

I'm trying to stop exceptions being thrown in a server, but I have no idea what the exceptions mean. This is getting thrown once every 5/10 seconds.
FATAL 28.Jul.2010 16:59:03 [ pool-1-thread-38017 ]: monitor.AppStarter$1           uncaughtException    Uncaught exception on thread Thread[pool-1-thread-38017,5,main]
org.springframework.remoting.RemoteAccessException: Could not access remote service [rmi://10.1.12.1:1296/ServerToClientCallback:1279539649652:2878]; nested exception is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
     java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
     java.io.OptionalDataException
Caused by:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
     java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
     java.io.OptionalDataException
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:336)
     at sun.rmi.transport.Transport$1.run(Transport.java:159)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     at java.lang.Thread.run(Thread.java:619)
     at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
     at org.springframework.remoting.rmi.RmiInvocationWrapper_Stub.invoke(Unknown Source)
     at org.springframework.remoting.rmi.RmiClientInterceptor.doInvoke(RmiClientInterceptor.java:391)
     at org.springframework.remoting.rmi.RmiClientInterceptor.doInvoke(RmiClientInterceptor.java:337)
     at org.springframework.remoting.rmi.RmiClientInterceptor.invoke(RmiClientInterceptor.java:257)
     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:166)
     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
     at $Proxy15.handleCallback(Unknown Source)
     at com.company.monitor.service.CallbackRegistrationServiceImpl$CallerThread.run(CallbackRegistrationServiceImpl.java:83)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     at java.lang.Thread.run(Thread.java:619)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
     java.io.OptionalDataException
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:293)
     at sun.rmi.transport.Transport$1.run(Transport.java:159)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
     ... 3 more
Caused by: java.io.OptionalDataException
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1349)
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
     at java.util.LinkedList.readObject(LinkedList.java:964)
     at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)
     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
     at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:306)
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:290)
     ... 9 moreThe code in "callback registration impl" is just
     public void run() {
               try {
                    logger.debug("Start sending a callback " + callback.getType() + " to " + client);
                    serverToClientCallback.handleCallback(callback);
               } catch (RemoteConnectFailureException e) {
                    logger.warn("A gui is disconnected from the server: " + client);
               }Line 83 is the "handleCallback" method call. "handleCallback" simply .adds the callback object to a LinkedBlockingQueue. I can't step through this because conditions that cause the exception to be thrown aren't recreatable on developer machines. I just need to get a vague idea of what the exception means so I can go about fixing it.
Edited by: Boyotbh on Sep 3, 2010 7:14 AM

It's not a remote exception it's a [java.io.OptionalDataException|http://download.oracle.com/javase/1.4.2/docs/api/java/io/OptionalDataException.html]. There's not all that much I can help you with. There's one other thread here. My guess is that you are not using RMI or serialization properly on both ends of the socket, but without seeing what you are doing, it's hard to tell. It's definitely an esoteric error (at least from my experience).
- Saish

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MyRemoteInterface.java
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface MyRemoteInterface extends Remote {
public String[] getNames() throws RemoteException;
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public MyServerImplementation()throws RemoteException{
super();
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// Bind this object instance to the name "HelloServer".
Naming.rebind("rmi://localhost:1985/GetNames", obj);
System.out.println("GetNames bound in registry");
catch (Exception e) {
System.out.println("GetNames error: " + e.getMessage());
e.printStackTrace();
public class MyRMIClient {
*@param args*
public static void main(String[] args) {
try {
MyRemoteInterface remObj = (MyRemoteInterface) Naming.lookup("rmi://localhost:1985/GetNames");
System.out.println("Names are "+remObj.getNames());
catch(Exception e) {
System.out.println("Problem encountered accessing remote object "+e);
}

That's a remote exception coming from the registry. You need to learn to recognize remote exceptions and their source, it's a mjaor source of confusion in RMI.
In this case it's the registry that can't find the stub class.
The stub class needs to be in the CLASSPATH of (i) the Registry and (ii) the client as well. Ditto the remote interface; ditto any application classes it refers to, and so on until closure.
The easiest way to achieve (i) is to start it in the server's JVM, with LocateRegistry.createRegistry().

DirectPropertyManagerBean remote fatal exception from user management um tags.

Hi
I am wondering if any one has experienced the same problems as us or if you have
some advice. Recently we put our web lgoic commerce server 3.5 running on weblogic
server 6.0 and MS SQL server 7 sp 3 into production.
Now we receive remote exceptions from the DirectPropertyManagerBean from our login
jsp pages and <um> tags intermittently which forces us to reboot the application
server a few times a week. This prevents any of our customers from logging into
our site once these exceptions start being thrown.
Our exception stack is Servlet failed with Exception> java.lang.NullPointerException:
at java.lang.String.<init>(String.java:193) at jsp_compiled._commerce._user._mydm._jspService(_mydm.java:282)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:213)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1265)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1631)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
####<2002/03/08 06:07:29> <Info> <EJB> <***> <wlcsServer> <ExecuteThread: '9'
for queue: 'default'> <angusg> <2269:e645911858eef116> <010051> <EJB Exception
during invocation from home: com.beasys.commerce.foundation.property.DirectPropertyManagerBeanHomeImpl@9f4365
threw exception: java.rmi.RemoteException: EJB Exception:; nested exception is:
java.rmi.RemoteException: Error checking for explicit property in profileType:
Customer Profile> java.rmi.RemoteException: EJB Exception:; nested exception is:
java.rmi.RemoteException: Error checking for explicit property in profileType:
Customer Profile java.rmi.RemoteException: Error checking for explicit property
in profileType: Customer Profile at com.beasys.commerce.foundation.property.DirectPropertyManagerBean.getExplicitProperty(DirectPropertyManagerBean.java:610)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanImpl.getExplicitProperty(DirectPropertyManagerBeanImpl.java:190)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBean.getProperty(DirectPropertyManagerBean.java:700)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBean.getProperty(DirectPropertyManagerBean.java:429)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanImpl.getProperty(DirectPropertyManagerBeanImpl.java:210)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanEOImpl.getProperty(DirectPropertyManagerBeanEOImpl.java:206)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanEOImpl_WLSkel.invoke(DirectPropertyManagerBeanEOImpl_WLSkel.java:160)
at weblogic.rmi.internal.BasicServerAdapter.invoke(BasicServerAdapter.java:373)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:128)
at weblogic.rmi.internal.BasicServerAdapter.invoke(BasicServerAdapter.java:237)
at weblogic.rmi.internal.BasicRequestHandler.handleRequest(BasicRequestHandler.java:118)
at weblogic.rmi.internal.BasicRequestDispatcher.dispatch(BasicRequestDispatcher.java:115)
at weblogic.rmi.internal.ServerRequest.sendOneWayRaw(ServerRequest.java:88) at
weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:108) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:247)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:225)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanEOImpl_WLStub.getProperty(DirectPropertyManagerBeanEOImpl_WLStub.java:219)
at com.beasys.commerce.user.jsp.beans.CachedProfileBean.getProperty(CachedProfileBean.java:128)
at com.beasys.commerce.user.jsp.beans.CachedProfileBean.getProperty(CachedProfileBean.java:165)
at com.beasys.commerce.user.jsp.tags.GetPropertyTag.getProperty(GetPropertyTag.java:161)
at com.beasys.commerce.user.jsp.tags.GetPropertyTag.doStartTag(GetPropertyTag.java:107)
at jsp_compiled._commerce._user._mydm._jspService(_mydm.java:268) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:213)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1265)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1631)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120).
Where should I be looking to address this issue? In the database or application
server?
Thanx João

Hi
I am wondering if any one has experienced the same problems as us or if you have
some advice. Recently we put our web lgoic commerce server 3.5 running on weblogic
server 6.0 and MS SQL server 7 sp 3 into production.
Now we receive remote exceptions from the DirectPropertyManagerBean from our login
jsp pages and <um> tags intermittently which forces us to reboot the application
server a few times a week. This prevents any of our customers from logging into
our site once these exceptions start being thrown.
Our exception stack is Servlet failed with Exception> java.lang.NullPointerException:
at java.lang.String.<init>(String.java:193) at jsp_compiled._commerce._user._mydm._jspService(_mydm.java:282)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:213)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1265)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1631)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
####<2002/03/08 06:07:29> <Info> <EJB> <***> <wlcsServer> <ExecuteThread: '9'
for queue: 'default'> <angusg> <2269:e645911858eef116> <010051> <EJB Exception
during invocation from home: com.beasys.commerce.foundation.property.DirectPropertyManagerBeanHomeImpl@9f4365
threw exception: java.rmi.RemoteException: EJB Exception:; nested exception is:
java.rmi.RemoteException: Error checking for explicit property in profileType:
Customer Profile> java.rmi.RemoteException: EJB Exception:; nested exception is:
java.rmi.RemoteException: Error checking for explicit property in profileType:
Customer Profile java.rmi.RemoteException: Error checking for explicit property
in profileType: Customer Profile at com.beasys.commerce.foundation.property.DirectPropertyManagerBean.getExplicitProperty(DirectPropertyManagerBean.java:610)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanImpl.getExplicitProperty(DirectPropertyManagerBeanImpl.java:190)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBean.getProperty(DirectPropertyManagerBean.java:700)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBean.getProperty(DirectPropertyManagerBean.java:429)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanImpl.getProperty(DirectPropertyManagerBeanImpl.java:210)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanEOImpl.getProperty(DirectPropertyManagerBeanEOImpl.java:206)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanEOImpl_WLSkel.invoke(DirectPropertyManagerBeanEOImpl_WLSkel.java:160)
at weblogic.rmi.internal.BasicServerAdapter.invoke(BasicServerAdapter.java:373)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:128)
at weblogic.rmi.internal.BasicServerAdapter.invoke(BasicServerAdapter.java:237)
at weblogic.rmi.internal.BasicRequestHandler.handleRequest(BasicRequestHandler.java:118)
at weblogic.rmi.internal.BasicRequestDispatcher.dispatch(BasicRequestDispatcher.java:115)
at weblogic.rmi.internal.ServerRequest.sendOneWayRaw(ServerRequest.java:88) at
weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:108) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:247)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:225)
at com.beasys.commerce.foundation.property.DirectPropertyManagerBeanEOImpl_WLStub.getProperty(DirectPropertyManagerBeanEOImpl_WLStub.java:219)
at com.beasys.commerce.user.jsp.beans.CachedProfileBean.getProperty(CachedProfileBean.java:128)
at com.beasys.commerce.user.jsp.beans.CachedProfileBean.getProperty(CachedProfileBean.java:165)
at com.beasys.commerce.user.jsp.tags.GetPropertyTag.getProperty(GetPropertyTag.java:161)
at com.beasys.commerce.user.jsp.tags.GetPropertyTag.doStartTag(GetPropertyTag.java:107)
at jsp_compiled._commerce._user._mydm._jspService(_mydm.java:268) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:213)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:1265)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:1631)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120).
Where should I be looking to address this issue? In the database or application
server?
Thanx João

Use exceptions declared in remote package

Hi,
When handling exceptions, I use their name as declared inside the package from where they are thrown:
MY_PACKAGE.OPERATION;
EXCEPTION
WHEN MY_PACKAGE.MY_EXCEPTION THEN
Now I'm using a package in a remote database however, so I try:
MY_PACKAGE.OPERATION@REMOTE_DB;
EXCEPTION
WHEN MY_PACKAGE.MY_EXCEPTION@REMOTE_DB THEN
This fails with:
PLS-00103: Encountered the symbol "@" when expecting one of the following: . then or The symbol ". was inserted before "@" to continue.
Am I missing something or is this a known database bug or something?
Thanks,
K.

Oooh, OK, I see, we have a bit of a misunderstanding here.
I do raise an "Application exception" through RAISE_APPLICATION_ERROR() in the remote procedure, and the appropriate exception number is returned to the local procedure.
The problem is when it comes to catching the exception. I can have error -20101 in both packages, and because they're different packages, the number is assigned to different kind of errors. If I catch the remote exception as the local number, I have a mix of definitions, which is really not advisable.
We do the same thing between local packages:
create or replace
PACKAGE A AS
TEST_E EXCEPTION;
PRAGMA EXCEPTION_INIT(TEST_E, -20101);
PROCEDURE TEST;
END A;
create or replace
PACKAGE BODY A AS
PROCEDURE TEST IS
BEGIN
RAISE_APPLICATION_ERROR(-20101, 'test');
END;
END A;
create or replace
PACKAGE B AS
DIFFERENT_E EXCEPTION;
PRAGMA EXCEPTION_INIT(DIFFERENT_E, -20101);
PROCEDURE TEST;
END B;
create or replace
PACKAGE B AS
PROCEDURE TEST IS
BEGIN
A.TEST;
EXCEPTION
WHEN A.TEST_E THEN
NULL;
END;
END B;
This works locally, but if package A is declared remotely, catching A.TEST_E@REMOTE_DB inside B.TEST won't compile. Catching A.TEST_E as B.DIFFERENT_E really isn't nice and very confusing.
So, is this a database bug?
Any suggestions that don't imply changing all error numbers in all our packages to be unique (which is almost impossible for the amount of work and the limit in number of application exceptions)?
Thanks,
K.

Marshall exception when calling a remote business method in EJB

Hi,
From a java client, i am calling a business method from a ejb. the home and remote interface object is sucessfully received at the client. but at the time of calling the remote business method the following error occurs.
java.rmi.RemoteException: ; nested exception is:
weblogic.rmi.ServerException: A remote exception occurred while executing the method on the
remote object
- with nested exception:
[weblogic.rmi.MarshalException: error marshalling return
- with nested exception:
[java.io.NotSerializableException: java.util.Vector$1]]
java.io.NotSerializableException: java.util.Vector$1
the business method returns an enumeration object.
How to solve this?
-chidam

hi chidambaresh,
you could have sent this to me directly.
the Enumeration si an interface and so the object we get during the runtime is basically an object of some implementation of this interface.
the Enumeration you get from HAshtable is actually Serializable.
but the Enumeration you actually get from Vector (this is actaully an inner class of Vector viz., Vector$1) is not serializable. that is what the error you are getting.
regards
Srinivasan.R
(VAMSOFT)

Trying to create a local instance of the remote object

Hi,
I have a ClassA on which I need to be able to invoke RMI calls. Problem is the interface which ClassA implements does not throw exceptions. To get around this problem I have created a wrapper class ClassWrap which has a ClassA attribute and calls made to ClassWrap are directed to this ClassA object. A facade type design I think it's called.
ClassWrap implements Remote so it can be used as a Remote object.
When I create an instance of ClassWrap and deploy it on a server, my client has no problem communicating with the remote ClassWrap object via a remote stub ClassWrap_Stub.
Problem is I also want my client to be able to use a local instance of ClassWrap. Whan I try to create an instance of ClassWrap in my client I get a remote Exception ... but !! when I have a ClassWrap_Stub object in my classpath then there is no problem creating a ClassWrap object.
Any ideas why this happens?

What you are trying to do should work just fine. Do you have the wrapper class file in your client jar?

Remote exceptions

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