Restarting a webapp via HTMLAdapter (jmx-console) works fine. Restarting a webapp via RMIAdapter, however, produces a lot of errors, mostly javax.management.InstanceAlreadyExistsException. Reading through the sources I could not find any serious differences between the way the HTMLAdapter invokes an operation on the MBean and the way RMIAdaptor does. The provided Ant task (jbossjmx-ant.jar) doesn't work either. Perhaps someone has a good hint or tip for me?

If you want to keep your JSP compilation results between server restarts you have to tell Jetty where to put the results. Otherwise Jetty will use a different directory on each restart. The simplest way is to add an init-parameter in webdefault.xml: [code] jsp org.apache.jasper.servlet.JspServlet scratchdir /tmp/jetty 0 [/code]

There's a nice article about Jakarta commons over at ONJava.com.