There's not really enough information to tell anything, but one problem I often have suggests itself based on the topic title.
If you have been starting Tomcat as ROOT, Tomcat has created a number of files owned by ROOT. If you then attempt to start as user "tomcat" - or any other non-root user, then the Tomcat startup will fail because it's attempting to create and/or access files that user "tomcat" is not permitted to access or change.
Customer surveys are for companies who didn't pay proper attention to begin with.
subject: No is possible deploy wars and run TomCat as user tomcat and no as ROOT ?