Exception in calling the statefull session bean method
Assalam o Alaykum
i am calling the method of session bean from JSP,but the JBOSS throws the following exception. What is the solution of the following problem..
Regrads
Aamar
2004-01-21 11:02:06,558 ERROR [org.jboss.ejb.plugins.LogInterceptor] TransactionRolledbackLocalException in method: public abstract java.lang.String remserver.devicemanagement.Devicetype.getDtmodel(), causedBy: java.lang.NullPointerException at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCEntityBridge.getLoadIterator(JDBCEntityBridge.java:554) at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityCommand.java:118) at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityCommand.java:72) at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadEntity(JDBCStoreManager.java:612) at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadEntity(JDBCStoreManager.java:594) at org.jboss.ejb.plugins.CMPPersistenceManager.loadEntity(CMPPersistenceManager.java:381) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.loadEntity(CachedConnectionInterceptor.java:352) at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:239) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:185) at org.jboss.ejb.plugins.EntityReentranceInterceptor.invokeEntityReentranceInterceptor.java:114) at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163) at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:89) at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:54) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:267) at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:128) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:118) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122) at org.jboss.ejb.EntityContainer.internalInvoke(EntityContainer.java:489)
at org.jboss.ejb.Container.invoke(Container.java:700)
at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:375)
at org.jboss.ejb.plugins.local.EntityProxy.invoke(EntityProxy.java:38)
at $Proxy125.getDtmodel(Unknown Source)