JiraSchedulerLauncher not notified with WSAD 5.1.2

It appears that, there is a bug with com.atlassian.jira.scheduler.JiraSchedulerLauncher under WSAD/WTE 5.1.

Developping a Service in order tio have a Rol lOver Backup, it appears that it never start with WSAD, but was correctly started when deployed on WebSphere 5.0.2.0 and WebSphere 6.0.2.0.

JiraSchedulerLauncher was never not notified when Context was initialized. There was no ClassLoaderError and nothing other mentionned errors.

Concerned Classes are

public class SchedulerLauncher implements ServletContextListener {
...
}

public class JiraSchedulerLauncher extends SchedulerLauncher {
...
}

In one of my plugin, I extend JiraSchedulerLauncher as follow and replace it in web.xml

public class JiraAddOnSchedulerLauncher extends JiraSchedulerLauncher implements javax.servlet.ServletContextListener {
...
}

and strangely, the Launcher is now correclty notified.

It appears that Listener Classes have to implement explicitely the ServletContextListener interface.

Thanks Big Blue !!