mvn tomcat:run - change default maven tomcat port

You can use:

mvn tomcat:run -Dmaven.tomcat.port=8081

to start it on a different port (8081 in this case).

Alternatively, define a pluginMangement section in your pom that configures the 'port' configuration on the tomcat plugin.

See documentation here http://tomcat.apache.org/maven-plugin-2.0/tomcat7-maven-plugin/run-mojo.html#port

And think about using new version located now at Apache ! The codehaus version is not anymore maintained !