If those com.careerChapter classes aren't yours, you'll probably have to turn off some of the convention plugin's package scanning--although they must be *somewhere*, otherwise they wouldn't be being scanned. Are you intending to use the convention plugin?
It's also possible that it's a different app deployed on the same server and the messages aren't related in any way to your application.
Why do you define a
Struts 1 taglib in your web.xml?