I am using Kamailio-4.1.5 and Kamailio-4.2.5 but with this both version I had a problem:

Connection diagrams:

SIP client ---- SBC --- Kamailio --- MGC/MGW --- GSM/PSTN subscriber

Scenario:

- Caller (SIP) make a new call to GSM (PSTN) subscriber

- When GSM/PSTN is ringing or not ringing, Caller cancel call (Caller send CANCEL message)

- But MGC does not send response message for CANCEL message

- After about 120s (fr_inv_timer), Kamailio send 487 Request Terminated to SBC.

I attached capture file and log when I show shared memory (using kamcmd core.shmmem) and tm statistics (using kamcmd tm.stats). And time Kamailio start memory leak is 08-30-15-10:18:53

Could you help me solve this problem?

Thank you so much!
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