[SR-Users] Cannot handle Cancel Request properly

[Aqs Younas]

Greetings list,

I am getting hard time to make kamailio perfectly handle cancels request.
I am using http_async_client and MSILO to handle push notifications.

Case 1. When B party record exists in location but it is off-line and I
send cancel *instantly* from Party A while kamailio is sending push to wake
B Party up.

modparam("tm", "failure_reply_mode", 3)
modparam("tm", "cancel_b_method", 1)
modparam("tm", "fr_timer", 30000)
modparam("tm", "fr_inv_timer", 120000)

You can see in below picture 407 being generated after some time.

[image: default.PNG]
 What could be the reason of this problem?

any pointer is much appreciated.

Br, Aqs.
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