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Problem in lookup Oracle DataSource

 
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I am running a project on WebShere 5.1 Test Environment, the project access an Oracle DataSource. The following code segment cause a ClassCastException:

Hashtable parms = new Hashtable();
parms.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory");
InitialContext ctx = new InitialContext(parms);
Object obj = ctx.lookup("jdbc/dev");
ds = (OracleConnectionPoolDataSource) obj;

java.lang.ClassCastException: com/ibm/ws/rsadapter/jdbc/WSJdbcDataSource incompatible with oracle/jdbc/pool/OracleConnectionPoolDataSource

What is the problem and how can I fix it?

Thanks
 
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ds = (OracleConnectionPoolDataSource) obj;



Change this to:

 
Tak Ming Laio
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When I make the change, the following exception results:

java.lang.Exception: Attempted to use a 5.0 DataSource outside of a 2.3 servlet
at com.ibm.ejs.j2c.ConnectionFactoryBuilderImpl.validServlet(ConnectionFactoryBuilderImpl.java:2162)
at com.ibm.ejs.j2c.ConnectionFactoryBuilderImpl.getCMConfigData(ConnectionFactoryBuilderImpl.java:1649)
at com.ibm.ejs.j2c.ConnectionFactoryBuilderImpl.getObjectInstance(ConnectionFactoryBuilderImpl.java:1231)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:313)
at com.ibm.ws.naming.util.Helpers.processSerializedObjectForLookupExt(Helpers.java:873)
at com.ibm.ws.naming.util.Helpers.processSerializedObjectForLookup(Helpers.java:680)
at com.ibm.ws.naming.jndicos.CNContextImpl.processResolveResults(CNContextImpl.java:1712)
at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1567)
at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1480)
at com.ibm.ws.naming.jndicos.CNContextImpl.lookupExt(CNContextImpl.java:1187)
at com.ibm.ws.naming.jndicos.CNContextImpl.lookup(CNContextImpl.java:1067)
at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:132)
at javax.naming.InitialContext.lookup(InitialContext.java:360)
at hk.gov.tid.diamond.dbaccess.DbaccessBase.initDatasource(DbaccessBase.java:61)
at hk.gov.tid.diamond.dbaccess.DbaccessBase.<init>(DbaccessBase.java:35)
at hk.gov.tid.diamond.admin.dbaccess.UserAccDbaccess.<init>(UserAccDbaccess.java:23)
at hk.gov.tid.diamond.struts.admin.UserLoginWriteHandle.execute(UserLoginWriteHandle.java:33)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:480)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1420)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:520)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:983)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:564)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:200)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:119)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:276)
at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:182)
at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:618)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:439)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:672)

please help again.
 
Marshal
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Then go back into the admin application and re-enter the data source as a "Version 4" data source.
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