[logback-user] Class not found exception for LoggingEventVO

[MDerr at nycm.com]

I have an application client set up to send a logging message over  a bus 
using a logback JMSQueueAppender.  Logback version is 0.9.24 and slf4j 
version is 1.6.1.

This is running on a Websphere 7.0 server in Rational Application 
Developer 7.5.

I've tested the bus and queue with a simple text message using the RAD 
Universal Test Client and that works fine, so at least the foundation is 
solid.

When I log a message to the message queue, I wind up with the following 
stack trace under a wide variety of attempts:

[8/11/10 14:44:16:223 EDT] 0000002b SystemOut     O Exception CWSIA0122E: 
An exception occurred deserializing a message, exception: 
java.lang.ClassNotFoundException: 
ch.qos.logback.classic.spi.LoggingEventVO.
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R 
javax.jms.MessageFormatException: CWSIA0122E: An exception occurred 
deserializing a message, exception: java.lang.ClassNotFoundException: 
ch.qos.logback.classic.spi.LoggingEventVO.
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.sib.api.jms.impl.JmsObjectMessageImpl.getObject(
JmsObjectMessageImpl.java:277)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.csg.logger.mdb.NYCMLoggerMDB.handleMessage(NYCMLoggerMDB.java:45)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.csg.logger.mdb.NYCMLoggerMDB.onMessage(NYCMLoggerMDB.java:36)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ejs.container.MessageEndpointHandler.invokeMdbMethod(
MessageEndpointHandler.java:1092)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ejs.container.MessageEndpointHandler.invoke(
MessageEndpointHandler.java:777)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
$Proxy42.onMessage(Unknown Source)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.sib.api.jmsra.impl.JmsJcaEndpointInvokerImpl.invokeEndpoint(
JmsJcaEndpointInvokerImpl.java:233)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.sib.ra.inbound.impl.SibRaDispatcher.dispatch(
SibRaDispatcher.java:900)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.sib.ra.inbound.impl.SibRaSingleProcessListener$SibRaWork.run(
SibRaSingleProcessListener.java:550)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ejs.j2c.work.WorkProxy.run(WorkProxy.java:399)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R Caused by: 
java.lang.ClassNotFoundException: 
ch.qos.logback.classic.spi.LoggingEventVO
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.lang.Class.forNameImpl(Native Method)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.lang.Class.forName(Class.java:136)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.util.WsObjectInputStream.loadClass(WsObjectInputStream.java:227
)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.util.WsObjectInputStream.access$000(WsObjectInputStream.java:53
)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.util.WsObjectInputStream$2.run(WsObjectInputStream.java:191)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.security.util.AccessController.doPrivileged(
AccessController.java:118)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.util.WsObjectInputStream.resolveClass(
WsObjectInputStream.java:164)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.util.WsObjectInputStream.resolveClass(
WsObjectInputStream.java:156)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1591)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1512)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1748)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1345)
[8/11/10 14:44:16:223 EDT] 0000002b SystemErr     R     at 
java.io.ObjectInputStream.readObject(ObjectInputStream.java:364)
[8/11/10 14:44:16:239 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.sib.api.jms.impl.JmsObjectMessageImpl.getObjectInternal(
JmsObjectMessageImpl.java:345)
[8/11/10 14:44:16:239 EDT] 0000002b SystemErr     R     at 
com.ibm.ws.sib.api.jms.impl.JmsObjectMessageImpl.getObject(
JmsObjectMessageImpl.java:271)
[8/11/10 14:44:16:239 EDT] 0000002b SystemErr     R     ... 10 more

This always happens when trying to get the message object out of the 
message in the onMessage code in my message driven bean. For example, the 
stack dump was generated at the event = . . . line in the code below:

                        if (msg instanceof ObjectMessage){
                                ObjectMessage objectMesssage = 
(ObjectMessage) msg;
                                System.out.println("Got ObjectMessage");
                                event = (ILoggingEvent) 
objectMesssage.getObject(); 
                        }

I have the logback classic jar on my classpath successfully because I use 
a number of other classes from it in my code.

If anyone can help with this, I would appreciate it. I can provide 
additional information as needed.

Thanks,

Merritt Derr


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