Tomcat Manager is the web console of the Tomcat web server. When you normally say
http://localhost:8080 then you get the Tomcat Homepage.
Now there are a few links on the top left side and one of them is the "Tomcat Manager".
Tomcat Manager is the page where you can see the list of applications deployed on your server and other essential properties for them.
One of the properties is "Running". It is depicted as a column on the Tomcat manager page.
What I meant was if the running property for your application is false then there was some error in deployment and tocat is not able to start your application.
The error can be because of many reasons like.
- Error in war file
- Error in deployment descriptor
- Error in tomcat application loader
or, multiple other reasons.
So, on the first case I suggest that you check the running property and see if it is false ( which I think must be the case). Then, just clean your project-recompile and make a fresh war and try to deploy it.
And just one more thing, if your project was made with eclipse on some other machine and you copied your project to another machine and deployed it, that can also lead to some issues as the .project file for eclipse
IDE stores some information for the native machine and this may lead to clashes when you try to deploy the code on Tomcat.
Hope that helps.