Hi, We have seen opensips 3.5.5 crash a number of times with the following error:
CRITICAL:dialog:_unref_dlg: bogus ref -1 with cnt 1 for dlg 0xffff88d91ed0 [3876:1041983204] with clid '[email protected]' and tags 'gK081ffb55' '9eccf1cd-5bd0-4a37-af30-8518660904a1' Each instance appears to be associated with a CANCEL race condition while proxying a siprec dialog. 10.10.13.149 = SRC/SBC 10.108.17.140 = Opensips proxy that is failing 10.10.13.149 = Destination proxy Time Source Dest Message 0.000000 10.10.13.149 10.108.17.140 Request: INVITE sip:10.108.17.140:5060 | 0.001208 10.108.17.140 10.10.13.149 Status: 100 Giving it a try | 0.001806 172.16.2.225 172.16.2.208 Request: INVITE sip:10.108.17.140:5060 | 0.003601 172.16.2.208 172.16.2.225 Status: 100 Giving it a try | 0.018433 172.16.2.208 172.16.2.225 Status: 200 OK (INVITE) | 0.022528 10.10.13.149 10.108.17.140 Request: CANCEL sip:10.108.17.140:5060 | 0.022767 10.108.17.140 10.10.13.149 Status: 200 canceling (CANCEL) | 0.023232 172.16.2.225 172.16.2.208 Request: CANCEL sip:10.108.17.140:5060 | 0.023742 10.108.17.140 10.10.13.149 Status: 200 OK (INVITE) | 0.024327 172.16.2.208 172.16.2.225 Status: 200 canceling (CANCEL) | 0.036620 10.10.13.149 10.108.17.140 Request: ACK sip:10.108.17.140;did=42f.4e66b1e3 | 0.036621 10.10.13.149 10.108.17.140 Request: BYE sip:10.108.17.140:5060;did=42f.4e66b1e3 | 0.037180 172.16.2.225 172.16.2.208 Request: ACK sip:172.16.2.208;transport=tcp | 0.037558 172.16.2.225 172.16.2.208 Request: BYE sip:172.16.2.208;transport=tcp | 0.085901 172.16.2.208 172.16.2.225 Status: 200 OK (BYE) | 0.087097 10.108.17.140 10.10.13.149 Status: 200 OK (BYE) | The error occurs 5s after the call completes – fr_timeout is set to 5s I have been unable to reproduce the error in a test environment, so cannot provide detailed logs. The only thing I’ve noticed is that for test calls when the CANCEL is received after the 200OK from the destination, the ACK is always forwarded prior to the BYE being received. Any idea what may be causing this? Is it likely to be a bug in opensips or the script. -- Richard Sievers Senior Software Engineer – Telecommunications Dubber
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