Class Loader Problem while sending a response from EJB to a webapplication

[Shiju K K]

Hi All,

I am using EJB 2.0, Axis2 Websrvice and Weblogic 8.1 Server.

I am trying to make a EJB call from my Axis2 Webservice part. I am deploying an ear file which contains both ejb and webservice war file.
Here, the EJB call is going fine, but wile returning a response object i am getting a ClassLoader Problem, which says that " Loader constrained violated for com.ejb.Response class".
I am having this class in com.jar file and placed in ear file. I have added the com.jar in manifest classpath entry of both war file and ejb.jar file. Both are sharing the same jar file.

But if while I am testing the ejb alone from a Junit test case the response is coming correctly.
and while I am testing the web service alone, with out having the ejb call inside, its going fine.

Can anybody help me out to resolve this issue.

Thanks in advance,

Shiju

[Roger Chung-Wee]

Is your web service and EJBs part of the same application? If so, then simply place the JAR file containing common classes like Response in APP-INF/lib. You do not need manifest entries as, from WebLogic Server 8.1, classes in APP-INF/lib are automatically loaded into the root classloader for the application. You will find that the Response.class is loaded once and is available to both your web service and EJB.

[Guttikonda Phaneendra]

Hi,
I am trying to expose the Web Service of EJB deployed in Weblogic using axis2. I have created and deployed aar file in axis2 services folder. The aar file contains the EJb Client jar, services.xml and the interfaces. When I tried to access the web service I got the following error. Please let me know how to fix this problem?


java.lang.ClassCastException: Cannot narrow remote object to test.HelloHome
at weblogic.iiop.PortableRemoteObjectDelegateImpl.narrow(PortableRemoteO
jectDelegateImpl.java:242)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134)
at org.apache.axis2.rpc.receivers.ejb.EJBUtil$EJBClientWorker.createRemo
eEJB(EJBUtil.java:156)
at org.apache.axis2.rpc.receivers.ejb.EJBUtil$EJBClientWorker.run(EJBUti
.java:128)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Wor
er.runTask(ThreadPoolExecutor.java:665)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Wor
er.run(ThreadPoolExecutor.java:690)
at java.lang.Thread.run(Thread.java:534)
ar 25, 2008 9:02:45 AM org.apache.axis2.transport.http.AxisServlet doPost
EVERE: java.lang.NullPointerException