File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Servlets and the fly likes Allocate exception for my firstr and very simple servlet Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Servlets
Reply locked New topic

Allocate exception for my firstr and very simple servlet

lucio bosque

Joined: Apr 28, 2010
Posts: 11
Hi ,
Can anyone please assist
I am a newbay to servlets , I am trying to create a simple servlet using eclipse helios with Jboss 5.1 GA .
I have created a new Dynamic Web project named JavaRanchSample , (AddingServletToSrc.JPG attach )
and then I have wrote the most simplest code can be in the DoPost method
PrintWriter out = response.getWriter();
out.println("Hello World");
Then I have tried to run it on the server (RunSrvOnJboss.JPG attach)
and I am getting the following exception :
20:22:03,250 ERROR [[FirstServlet]] Allocate exception for servlet FirstServlet
java.lang.ClassNotFoundException: lucio.FirstServlet
at Method)
at java.lang.ClassLoader.loadClass(
at java.lang.ClassLoader.loadClass(
at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(
at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(
at org.apache.catalina.core.StandardWrapper.loadServlet(
at org.apache.catalina.core.StandardWrapper.allocate(
at org.apache.catalina.core.StandardWrapperValve.invoke(
at org.apache.catalina.core.StandardContextValve.invoke(
at org.apache.catalina.core.StandardHostValve.invoke(
at org.apache.catalina.valves.ErrorReportValve.invoke(
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(
at org.apache.catalina.core.StandardEngineValve.invoke(
at org.apache.catalina.connector.CoyoteAdapter.service(
at org.apache.coyote.http11.Http11Processor.process(
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(

[Thumbnail for SimplestServletCode.JPG]

[Thumbnail for AddingServletToSrc.JPG]

Martin Caminoa

Joined: Oct 25, 2010
Posts: 5
Seems to be related to web.xml configuration file.
lucio bosque

Joined: Apr 28, 2010
Posts: 11
thanks for you quick replay
I have tried alot of time to customize my web.xml file without success
the basic setting are as in the image attach.
and it's seems just fine

[Thumbnail for webxml.JPG]

David O'Meara

Joined: Mar 06, 2001
Posts: 13459

If you right-click the project and check the build path, the bottom of the first tab should have the default output folder and should be
(something something something)/WEB-INF/classes
Bear Bibeault
Author and ninkuma

Joined: Jan 10, 2002
Posts: 63839

Please do not cross-post the same question in multiple forums. It wastes people's time when multiple redundant conversations take place. Please click this link ⇒ CarefullyChooseOneForum ⇐ for more information.

[Asking smart questions] [About Bear] [Books by Bear]
I agree. Here's the link:
subject: Allocate exception for my firstr and very simple servlet
It's not a secret anymore!