Cannot start app on tomcat with intellij

Question

I am trying to run my web app with IDEA intellij and tomcat server. I downloaded tomcat server, paste it in program files, made CATALINA_HOME and edit path to %CATALINA_HOME%\bin; . My run config:

When I start tomcat server from bin/startup.bat and try to run project I got error Error running event: Address localhost:8080 already in use.

When I don't start tomcat with bat file first I got an error: Application server was not connected before run configuration stop, reason: Unable to ping server at localhost:1099. When I run that bat script from tomcat and go to localhost:8080 i see tomcat start window.

Answer 1

1. check if you're using JDK 8 with Tomcat 9
2. in your "Run Configuration", go to the tab "Deployment" and ensure that you've selected the correct war and chose a deployment path. For convenience, add the deployment path to the URL in the "After launch" section on the tab "Server"
3. in your screenshot, on the tab "Server", I see there is no action defined in the section "Before launch". Did you delete it? By default, there are two entries like Build and Build 'simpleServlet:war' artifact. Add these entries by clicking on +
4. before you start your web app via IntelliJ, ensure that Tomcat isn't running: open a browser and enter the URLhttp://localhost:8080 . There must be an error message "no connection" or similar. If you see the welcome page, stop Tomcat.
5. run your application via IntelliJ