Please UseCodeTags when posting code in the forums. You can edit your post and add the code tags. And you need to TellTheDetails, what the resource you were trying to access and what is already rendered etc... ?
You should be able to get more useful information out of your browser by turning off "Friendly HTTP error messages" - in MS explorer the checkbox is under the Internet Options dialog - Advanced -> Browsing
The location of "source packages" is not important - where are the compiled class files located for this web app?
(I really don't think people should use any IDE when starting servlets, they just add complication. When you have a firm idea of where things go, then maybe.)
I had used Eclipse and Tomcat few days ago, but didn't face any problem that time.
where are the compiled class files located for this web app?
If I'm using Netbeans and GlassFish this time, then is there any additional setup I need to do ?
I remember there was nothing I had to do in addition to the standard procedure for Eclipse + Tomcat.
For this app, how to declare the location of the class files in Netbeans/Glassfish ?
Also, I got few problems for Eclipse during running of the program but these were simple mistakes like wrong url pattern/welcome file name for which I used to get 404 page not found error.
But this error "Link appears to be broken" is more puzzling...
I thought Netbeans/Gsfsh would locate it automatically..
If I'm using Netbeans and GlassFish this time, then is there any additional setup I need to do ?...
It depends on how you do it... Easiest thing would be to check what is inside the deployed application in the web container (whether it has .class files in <context>/WEB-INF/classes/ etc...). Check the structure of the application once deployed, you may post it here....