I am deploying jforum-2.1.9 in Glassfish4 server it was deployed successfully, but when I launch the application it is saying http status 404 not found .I tried defining root context also still same issue. Please help me out in resolving this issue in windows platform .
First of all: Don't use JForum 2.1.9. That version has long been obsolete and has numerous security holes. Get the latest version 2.4.1 from https://sourceforge.net/projects/jforum2/, or -even better- build it from source, as there are numerous improvements and fixes that have not been formally released (but which are stable).
Secondly, what URL are you trying to access? And are there any error messages either in the Tomcat logs or in the JForum-specific log?