Can't open Integration Builder Repository in SAP XI 7.0 after CodeMigration

Question

We had Communication Channel code change , for which the cache in the adapter engine was failed up update automatically. I rebounced the Web AS SAP Server ( Java stack only) and after than point I cannot launch Integration Builder Tool( Repository) in SAP XI 7.0.All other message are processing fine.Only we cannot open the Integration Buildter tool using URL
http://<hostname>:58900/rep/start/index.jsp
500 Internal Server Error
Exception
An internal error occurred. Contact you XI administrator
java.lang.NoClassDefFoundError: com.sap.aii.ibrep.server.transport.impl.service.InternalRepTransportServiceImpl (initialization failure)
Error Details, Error History, Build Info, Generic Application Info
Any take on this one?Please help. This is our Production Server.
Thanks
Satpal Singh

Answer 1

Praveen,
Restarted both ABAP and JAVA , but did not helped.We did that as first step.
We are unable to launch the Integration Server Repositorty Tool.
We get following detail on the Error info of the page that shows up.
500   Internal Server Error
Exception Details
Exception class: java.lang.NoClassDefFoundError
Message
java.lang.NoClassDefFoundError: com.sap.aii.ibrep.server.transport.impl.service.InternalRepTransportServiceImpl (initialization failure)
Stacktrace
Thrown:
java.lang.NoClassDefFoundError: com.sap.aii.ibrep.server.transport.impl.service.InternalRepTransportServiceImpl (initialization failure)
     at java.lang.J9VMInternals.initialize(J9VMInternals.java:130)
     at com.sap.aii.ibrep.server.transport.api.RepTransportServiceStartup.startupIbrepTransportServices(RepTransportServiceStartup.java:22)
     at com.sap.aii.ibrep.server.applcomp.StartupCodeEntry.startup(StartupCodeEntry.java:442)
     at com.sap.aii.ib.core.applcomp.IStartupCodeEntry.startupIfNotAlreadyDone(IStartupCodeEntry.java:33)
     at com.sap.aii.ib.core.applcomp.ExplicitApplicationComponentImpl.startup(ExplicitApplicationComponentImpl.java:116)
     at com.sap.aii.ib.core.applcomp.ExplicitApplicationComponents.startup(ExplicitApplicationComponents.java:383)
     at com.sap.aii.ib.core.applcomp.ApplicationComponent.startup(ApplicationComponent.java:209)
     at jsp_Main1203628046558._jspService(jsp_Main1203628046558.java:21)
     at com.sap.engine.services.servlets_jsp.server.jsp.JspBase.service(JspBase.java:112)
     at com.sap.engine.services.servlets_jsp.server.servlet.JSPServlet.service(JSPServlet.java:544)
     at com.sap.engine.services.servlets_jsp.server.servlet.JSPServlet.service(JSPServlet.java:186)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(AccessController.java:215)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)