No servlet class has been specified for servlet null

Question

Hi,
I�m trying to bend tomcat in my own application. Therefore I�m using the Embedded Tomcat version 5.5.23.
I have started only a server, engine, host and context, so I have a server without the sockets etc. this because it has to become a test-application for the web-app of the company.
The server starts gracefully, but when I call context.invoke(request,response) I get this error:
SEVERE: Allocate exception for servlet null
With this stacktrace:
javax.servlet.ServletException: No servlet class has been specified for servlet null
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1016)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:791)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:127)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:870)
at nl.realworks.embedTomcat.EmbedTomcat.invoke(EmbedTomcat.java:74)
at nl.realworks.embedTomcat.StartEmbedTomcat.main(StartEmbedTomcat.java:29)
Exception in thread "main" java.lang.NullPointerException
at org.apache.catalina.connector.Request.setAttribute(Request.java:1383)
at org.apache.catalina.core.StandardWrapperValve.exception(StandardWrapperValve.java:331)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:145)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:870)
at nl.realworks.embedTomcat.EmbedTomcat.invoke(EmbedTomcat.java:74)
at nl.realworks.embedTomcat.StartEmbedTomcat.main(StartEmbedTomcat.java:29)
does anyone has a idea what the cause of this problem is? The request I send is �GET /index.jsp� using a MockHttpServletRequest of the spring framework. I convert the mockhttpservletrequest to a org.apache.cataline.connecor.Request. and that works.
The code in tomcat where the error is caused by:
// Complain if no servlet class has been specified
if (actualClass == null) {
unavailable(null);
throw new ServletException
(sm.getString("standardWrapper.notClass", getName()));
Thanks in advance.
Auke Noppe

Answer 1

Tobias
Yes , you are correct. We dont need to replicate DDIC tables for direct BW replication. This was the first time we were working with BW on Hana and never installed DMIS component on that system. The error was gone after we put the addon.
Mahesh Shetty