Mac Java Could not start Tomcat - Address already in use

Could not start Tomcat: Protocol handler initialization failed: java.net.BindException: Address already in use :8080 -> [Help 1]

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:tomcat-maven-plugin:1.1:run (default-cli) on project hello: Could not start Tomcat

If you are running on the Mac, try this

pkill -9 java