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javax.ejb.EJBException: Impossible to create the MyBean: EJB Exception:

karunan mon
Greenhorn

Joined: Apr 27, 2007
Posts: 1
Hi friends,
I have created an session ejb and iam calling the ejb from a message drivenbeans ejb create method it look like this

context = new InitialContext();
service = (String) context.lookup("java:comp/env/myapp/ApplicationService");
ref = context.lookup("java:comp/env/myapp/myApplicationBean");
myEjbHome = (myEjbHome) PortableRemoteObject.narrow(ref, myEjbHome.class);
myRemoteEjb = myEjbHome.create();



in my ejb-jar.xml have a reference like this

<ejb-ref>
<ejb-ref-name>myapp/myApplicationBean</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<home>it.ejb.jms.myEjbHome</home>
<remote>it.ejb.jms.myRemoteEjb</remote>
<ejb-link>MyBean</ejb-link>
</ejb-ref>

I have a description in weblogic-ejb-jar.xml

<ejb-reference-description>
<ejb-ref-name>myapp/myApplicationBean</ejb-ref-name>
<jndi-name>MyBean</jndi-name>
</ejb-reference-description>


But while invoking the ejb i get error like this

Caused by: javax.ejb.EJBException: Impossible to create the MyBean: EJB Exception:; nested exception is:
java.lang.NullPointerException

can any one sugget some solution

thanks
Sunil Dixit
Ranch Hand

Joined: Sep 22, 2005
Posts: 46
Hi,

One possible reason is your EJB is not properly deployed on the server. Please check on log file whether your EJB is sucessfully deployed or not?

Another possible reason may be,If your EJB client is not running under any container than you need to set follwing parameters before you write 'context = new InitialContext();'

- URL prefixes
- JNP provider
- JNP protocol

Make it sure that required jar are available in your class path.

hope that this will help you.

Sunil
 
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