When you stop, restart, or halt an MPP, any CCXML application currently running on that MPP is sent a ccxml.kill event. This event notifies the application that the MPP is shutting down when the grace period expires.
If you do not define an error handler for this event in your CCXML application, the application exits immediately, even if it still processing a call.
Procedure
To keep the CCXML application active until the grace period has expired or until the application encounters an </exit> tag, add the following event handler to your CCXML application:
<transition event="ccxml.kill">
<!-- Do nothing. Platform will kill session
after grace period-->
</transition>
