[Kamailio-Users] tm retransmits and times out even though reponse is received

Hello, I'm seeing an increasing amount of spurious timeouts on my proxies. Even though the proxy receives a "100 Trying" response immediately after relaying the request, tm will send retransmits and times out eventually. Below is a commented log snippet. The timeout occurs on the proxy named 'balancer1'. Both are on the same host. I verified that the 100 Trying response is received in a t_on_reply block, so it is recognized by tm as belonging to a transaction. When needed, I'll provide a debug log when it occurs again. Meanwhile, any idea what is causing this? This is on kamailio 1.5+svn5768 fr_timer = 10 fr_timer_avp = 2 # Initial request received on balancer May 15 12:32:01 balancer1[24170]: [2 INVITE] - New request. <sip:uac@domain> => <sip:uas@domain> May 15 12:32:01 balancer1[24170]: [2 INVITE] Relaying # Initial request received on proxy May 15 12:32:01 proxy1[23803]: [2 INVITE] - New request. <sip:uac@domain> => <sip:uas@domain> # Balancer receives 100 response May 15 12:32:01 balancer1[24166]: [2 INVITE] - Reply. 100 Trying # Proxy relays request May 15 12:32:01 proxy1[23803]: [2 INVITE] Relaying # Proxy receives retransmission from balancer ??? May 15 12:32:02 proxy1[23804]: [2 INVITE] - New request. <sip:uac@domain> => <sip:uas@domain> # Balancer times out ??? May 15 12:32:02 balancer1[24171]: [2 INVITE] Failure (Status: 408) May 15 12:32:02 balancer1[24171]: [2 INVITE] No more gateways May 15 12:32:02 proxy1[23804]: [2 CANCEL] - New request. <sip:uac@domain> => <sip:uas@domain> -- Greetings, Alex Hermann