Apache24 and Apache Tomcat using mod_jk. How to make Apache24 return some custom error page when Tomcat is unavailable

Question

Im using Apache24 And Tomcat via mod_jk

Tomcat webapp allsow connects to some WebServices which can be temporary unavailable

While theese Webservices are unavailable user observes the stack of Java errors. Sometimes I need tomcat to be stopped or restart or webapp undeploy/deploy process. When it happens user observes allsow unpleasent page

I'd like when it happens make Apache24 return some page "Under consruction" or "Something go wrong, please wait", but not the stack trace or 404, 503 and other pages

Thanks in advance