Why my SipServlet throwing "SipApplicationSession is not valid." exception ?

[alp carsikarsi]

Hello everbody ,

I coded a Sip Servlet which behave like a BACK2BACK UA. My Sip Servlet is running over GlassFish v2 JavaEE5 Sailfin server.
2 Sip Clients talking over my Sip Servlet successfully.
But after a certain time (~2 minutes and 50 seconds) my Sip Servlet throws
"java.lang.IllegalStateException: SipApplicationSession is not valid." exception. And Sip Servlet can't ended the conversation.
Why did it happen all the time ? What can i do with it ?
Is there a solution ?

[alp carsikarsi]

With the help of your suggestions(!?) i added into sip.xml the following attribute :

<!-- Session will be terminated otomatically after 60 minutes. -->
<session-config>
<session-timeout>60</session-timeout>
</session-config>

So that my session expired problem resolved.

Also i added this row into sip.xml :
<listener>
<listener-class>tr.com.xxxx.sip.xxx.ApplicationSessionListener</listener-class>
</listener>
By the help of this when session expired ApplicationSessionListener's
public void sessionExpired(SipApplicationSessionEvent sipApplicationEvent) method is called. And i did the neccessary work in this method.

Respects...