The log for the error is as follows:
<May 28, 2013 3:07:47 PM IST> <Error> <HTTP> <BEA-101020> <[weblogic.servlet.internal.WebAppServletContext@a8d6b3 - appName: '_workshop_auto_generated_ear_', name: '####', context-path: '/####']
Servlet failed with Exception
java.lang.NullPointerException
at jsp_servlet._jsp._xyz.__xxx._jspService(__xxx.java:268)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:226)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:124)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)
Truncated. see log file for complete stacktrace