Hello all, I've encountered interesting thing while working with Apache Tomcat 6.0.14. I have clear aim: to change running server port number using the remote application.
There is an ability described in Tomcat documentation which provides administrative tools for server management. In particular JMX Proxy servlet ( http://tomcat.apache.org/tomcat-6.0-doc/manager-howto.html#JMX%20Set%20command<http://tomcat.apache.org/tomcat-6.0-doc/manager-howto.html#JMX%2520Set%2520command>) provides commands that use server JMX MBeans to change its configuration. There is an assertion in chapter Catalina Functional Specifications http://tomcat.apache.org/tomcat-6.0-doc/funcspecs/fs-admin-apps.html): "To the maximum extent feasible, Catalina components that offer direct administrative APIs and property setters shall support "live" changes to their operation, without requiring a container restart." JMX MBeans components described like such API. In chapter Tomcat MBean Names ( http://tomcat.apache.org/tomcat-6.0-doc/docs/funcspecs/mbean-names.html) Connector MBean is mentioned. It corresponds to Server/Service/Connector element of server.xml configuration file. Chapter "Administered Objects" contains the list of configurable properties of Connector element (http://tomcat.apache.org/tomcat-6.0-doc/funcspecs/fs-admin-objects.html#Connector ), and there is a property "port - TCP/IP port number on which this Connector should listen for incoming requests. [8080]". My remote application named "myapp" (myapp.war) tries to change server port number. The most interesting is that I receive beneficial reply "OK - Attribute set". Does it mean that now I can work with my application on a new port number without restarting server, for example old URL http://localhost:8080/ <http://localhost:8080/jmx>myapp<http://localhost:8080/jmx>and new http://localhost:8081/ <http://localhost:8081/jmx>myapp<http://localhost:8081/jmx>or my understandings are wrong? My application (myapp.war) consist of single html page, containing single link to JMXProxyServlet - <a href="/manager/jmxproxy/?set=Catalina:type=Connector,port=8080&att=port&val=8081">Change connector port to 8081</a> After setting the new port number using JMX Proxy servlet I have executed JMX Query command to check my changes and received new port (8081) for MBean "Catalina:type=Connector,port=8080". My environment: Apache Tomcat/6.0.14, Windows 2000 x86, Java 1.6.0_03-b05, IE 6.0 Any of your comments according this issue would be much appreciated. Thank you in advance. My best regards, Konstantin
