ServletInstan X Uncaught service() exception

[javi cervera]

Sometimes I obtained this message :
ServletInstan X Uncaught service() exception thrown by servlet {0}: {1}
I am not able to find the error in the source code (.jsp).
How could i search the error, becouse this message is very generical:

[02.02.01 15:43:42:750 GMT+01:00] 1a519d45 ServletInstan X Uncaught service() exception thrown by servlet {0}: {1}
"WCS JSP Compiler"
com.sun.jsp.JspWithNoErrorPageException: Server caught unhandled exception from JSP [shoppingcart_frame.jsp]
at javax.servlet.ServletException.<init>(ServletException.java:132)
at com.ibm.websphere.servlet.error.ServletErrorReport.<init>(ServletErrorReport.java:43)
at com.ibm.servlet.engine.webapp.WebAppErrorReport.<init>(WebAppErrorReport.java:32)
at com.sun.jsp.JspWithNoErrorPageException.<init>(JspWithNoErrorPageException.java:26)
at D_0003a.WebSphere.WCS.stores.web.InFashion.InFashion_shoppingcart_frame_jsp_1._jspService(InFashion_shoppingcart_frame_jsp_1.java:503)
at com.sun.jsp.runtime.HttpJspBase.service(HttpJspBase.java:175)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.sun.jsp.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:159)
at com.sun.jsp.runtime.JspServlet.serviceJspFile(JspServlet.java:608)
at com.sun.jsp.runtime.JspServlet.service(JspServlet.java:718)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java:580)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java:160)
at com.ibm.servlet.engine.webapp.ServicingServletState.service(StrictLifecycleServlet.java:307)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java:105)
at com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:353)
at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java:729)
at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java:655)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:338)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:175)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:93)
at com.ibm.commerce.webcontroller.JspExecUnit.execute(JspExecUnit.java)
at com.ibm.commerce.webcontroller.WebController.executeTransaction(WebController.java(Compiled Code))
at com.ibm.commerce.webcontroller.WebController.processRequest(WebController.java)
at com.ibm.commerce.adapter.HttpAdapterImpl.processRequest(HttpAdapterImpl.java)
at com.ibm.commerce.server.RequestServlet.service(RequestServlet.java)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

[Danl Thompson]

I get the same message. Our websphere app server 3.5.4 runs fine on NT, but gives us the ServletInstan X Uncaught service() exception under Solaris 5.7 - I'm looking for clues...