In the WEB-INF folder of my webapp, which I'll call ABC, there is a context.xml containing a jdbc resource.  When tomcat deploys the war file, the context.xml is ignored.  Some research on the web suggested that the context should be in a file called ABC.xml in /etc/tomcat/Catalina/localhost and that tomcat should automatically copy it there.  I copied my context.xml file to that location as ABC.xml and the jdbc resource works.  However, when I deployed a new version of my ABC.war file, the context file in /etc/tomcat/Catalina/localhost was removed and jdbc stopped working again.  I tried naming the file in WEB-INF as ABC.xml instead of context.xml and that didn't make any difference.  There shouldn't be a permissions problem, since tomcat is able to delete files out of the directory.  Am I doing something wrong or is tomcat?