I am working with a counter example from the book: "Mastering Enterprise JavaBeans". When I try to deploy the stateful session bean, I get this error message:
[ERROR,ContainerFactory] InternalError
java.lang.NullPointerException
at org.jboss.ejb.plugins.StatefulSessionFilePersistenceManager.init(StatefulSessionFilePersistenceManager.java:111)
at org.jboss.ejb.StatefulSessionContainer.init(StatefulSessionContainer.java:199)
at org.jboss.ejb.Application.init(Application.java:202)[INFO,ContainerFactory] Deploying Count
at org.jboss.ejb.ContainerFactory.deploy(ContainerFactory.java:372)
at org.jboss.ejb.ContainerFactory.deploy(ContainerFactory.java:306)
at java.lang.reflect.Method.invoke(Native Method)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1628)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.deployment.J2eeDeployer.startModules(J2eeDeployer.java:487)
at org.jboss.deployment.J2eeDeployer.startApplication(J2eeDeployer.java:459)
at org.jboss.deployment.J2eeDeployer.deploy(J2eeDeployer.java:190)
at java.lang.reflect.Method.invoke(Native Method)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1628)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.deployment.AutoDeployer.deploy(AutoDeployer.java:395)
at org.jboss.deployment.AutoDeployer.run(AutoDeployer.java:233)
at java.lang.Thread.run(Thread.java:484)
Any ideas???
