I have strange thing when I try to modify Spring project inside my Spring Tool Suite. On the first load (deploy) everything is fine, application compiles and runs on localho
This is a typical startup failure due to the embedded servlet container’s port being in use.
Your embedded tomcat container failed to start because Port 8080 was already in use.
Just Identify and stop the process that's listening on port 8080 or configure (in you application.properties file )this application to listen on another port.