NoClassDefFoundError SessionLogEntry

Olá,

Hoje tive o erro java.lang.NoClassDefFoundError: org/eclipse/persistence/logging/SessionLogEntry ao fazer deploy da minha aplicação no WebSphere 8.

Segue log completo:

[23/10/12 14:31:14:570 BRST] 00000025 AppManagement W ADMA0116W: Unable to start: myapp-ear using: WebSphere:name=ApplicationManager,process=server1,platform=proxy,node=localhost8080Node01,version=8.0.0.0,type=ApplicationManager,mbeanIdentifier=ApplicationManager,cell=localhost8080Node01Cell,spec=1.0 exception is: javax.management.MBeanException: Exception thrown in RequiredModelMBean while trying to invoke operation startApplication
at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1112)
[...]
Caused by: com.ibm.ws.exception.RuntimeError: java.lang.RuntimeException: java.lang.NoClassDefFoundError: org/eclipse/persistence/logging/SessionLogEntry
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:753)
[...]
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:4218)

O erro era porque eu não tinha nenhuma classe com @Entity na minha aplicação.. aí dava esse NoClassDefFoundError SessionLogEntry...

Ao adicionar essa classe:

package br.com.localhost8080.myapp;

import javax.persistence.Entity;

@Entity
public class MyTest {

}

O erro parou de acontecer!

Tive um erro semelhante a esse que postei em: http://localhost8080.blogspot.com.br/2012/10/nomodulefileexception.html

Vaaaaleu!!
Adriano Schmidt