Moving from TomEE to Tomcat, the container directory will be different. It may not be common, but some installations may be mounting files into /opt/tomee. On startup, the init scripts should check for mounted files there, give a warning that it's deprecated, and copy them to /opt/tomcat. There should be a new environment variable to skip the check copy, in case there is some reason they would want them to stay in /opt/tomee.