Dynamic Setting of Server Port in Tomcat

[Jeffies Shah]

Hi,

Is it possible to set Tomcat port dynamically from a text file or a properties file? If so, how to achieve that?

Thanks and regards,
Jaffer.

[William Brogden]

The ports Tomcat uses are set on startup from the server.xml file, if you want to change ports you have to restart Tomcat.
Why would you want to change ports dynamically? You can have multiple instances of Tomcat running on the same machine if you assign them different ports.

Bill

[Kalpesh Patel]

As William said, you can use multiple tomcat installed and one of them can work as load balancer. You can use module JK connector for this purpose.

[Jeffies Shah]

Thanks William and Kalpesh!

Actually, I want to start Tomcat using a script. Before starting tomcat in a port, I want to check whether someother application or someother tomcat itself is running on that port. If some application is running on that port, I can start Tomcat in a different free port.

So, is there a way to dynamically set Tomcat port, before starting it?

Thanks and regards,
Jaffer.

[William Brogden]

As I said already, Tomcat sets ports based on the contents of server.xml - you could certainly re-write server.xml with revised port numbers before starting Tomcat.
Bill