asterisk chan_sip locking randomly

Question

chan_sip locks causing registration issues with asterisk realtime mysql when displaying the following errors: chan_sip.c:3821 retrans_pkt: Retransmission timeout reached on transmission for seqno 1 (Critical Response) chan_sip.c:3821 retrans_pkt: Retransmission timeout reached on transmission for seqno 106 my registrations to my sip providers then timeout with the following errors: chan_sip.c:13661 sip_reg_timeout: -- Registration for xxx timed out, trying again

this is not a connectivity issue as restarting asterisk will re-register to the sip providers immediately the connections eventually re-establish, registrations start registering until the above happens again at a random interval. Server is a dedicated non natted server. What could be the issue?

Answer 1

if you have debian or ubuntu, turn off res_timing_pthread.so and use res_timing_dahdi.so

That fix such issue.