NoClassDefFoundError WsnInitialContextFactory com/ibm/ejs/ras/Tr

Question

This is a very well known question.
I try to call datasource from a POJO.
My code is:
Hashtable properties = new Hashtable();
properties.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory");
properties.put(Context.PROVIDER_URL, "iiop://localhost:myPortNumber);
Context context = new InitialContext(properties);
DataSource ds = (DataSource) context.lookup("jdbc/myDS");
Line: Context context = new InitialContext(properties); throws Exception as shown below:
Exception in thread "main" java.lang.NoClassDefFoundError: com/ibm/ejs/ras/Tr at com.ibm.websphere.naming.WsnInitialContextFactory.<clinit>(WsnInitialContextFactory.java:68).null(Unknown Source)
I have following jar files in build path of the project in following sequence:
idl.jar, iwsorb.jar,j2ee.jar,naming.jar, namingclient.jar,rt.jar, additinal jars in WebSphere v5.1JRE.
Do I need additional jar files?
There is no good documentation on the required jar files.

Answer 1

Hello ,my friend.Thank you for your kindness to see my question
This is my log on my websphere console
I want deploy my project from a weblogic to a websphere , Now I try to use Jbuilder and websphere to deploy my code ,but I met a lot of question ,Can you help me? Thank you
Exception in thread "main" java.lang.NoClassDefFoundError: com.ibm.ejs.ras.Tr
     at com.ibm.ws.util.ImplFactory.<clinit>(ImplFactory.java:77)
     at java.lang.J9VMInternals.initializeImpl(Native Method)
     at java.lang.J9VMInternals.initialize(J9VMInternals.java:177)
     at com.ibm.ws.runtime.WsServer.<clinit>(WsServer.java:51)
     at java.lang.J9VMInternals.initializeImpl(Native Method)
     at java.lang.J9VMInternals.initialize(J9VMInternals.java:177)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:615)
     at com.ibm.ws.bootstrap.WSLauncher.main(WSLauncher.java:263)