Javax.ejb.EJBException: Could not instantiate bean

Question

Hi All,
I get the following exception when i run my EJB Client code.
Exception in thread "main" java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.ServerException: EJBException:; nested exception is:
javax.ejb.EJBException: Could not instantiate bean
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:325)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:126)
at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source)
at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:118)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:227)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:167)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:55)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:169)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:86)
at $Proxy1.create(Unknown Source)
Caused by: javax.ejb.EJBException: Could not instantiate bean
at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:180)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invokeHome(StatelessSessionInstanceInterceptor.java:78)
at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:90)
at org.jboss.ejb.plugins.CallValidationInterceptor.invokeHome(CallValidationInterceptor.java:41)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:109)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:300)
at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:146)
at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:116)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:121)
My Client Code is as follows:
package com.css.sample.client;
import com.css.sample.MyHome;
import com.css.sample.MyRemote;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
public class MyClient {
/** Creates a new instance of MyClient */
public MyClient() { }
public static void main(String args[]) throws Exception {
Context ctx = new InitialContext();
Object objRef = ctx.lookup("MyBean");
MyHome home = (MyHome) PortableRemoteObject.narrow(objRef, MyHome.class);
MyRemote remote = home.create();
String name = remote.printName("Test");
System.out.println("Name : " + name);
ejb-jar.xml
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar version="2.1" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
<display-name>MySampleEjbBean</display-name>
<enterprise-beans>
<session>
<display-name>MyEjbBean</display-name>
<ejb-name>MyEjbBean</ejb-name>
<home>com.css.sample.MyHome</home>
<remote>com.css.sample.MyRemote</remote>
<ejb-class>com.css.sample.MyEjb</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>MyEjbBean</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>NotSupported</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
jboss.xml:
<?xml version="1.0" encoding="UTF-8"?>
<jboss>
<enterprise-beans>
<session>
<ejb-name>MyEjbBean</ejb-name>
<jndi-name>MyBean</jndi-name>
<configuration-name>Standard Stateless SessionBean</configuration-name>
</session>
</enterprise-beans>
</jboss>
I dont know where the problem occurs. Please help.

Answer 1

There should be a 'caused by' entry in your stack.
If your ejbCreate() method is connecting to the DB and this error only occurs when the DB is down - what exactly is your question?
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