[asterisk-dev] SIP Deadlock/Pause

[Ross Beer]

Hi Anne,

We only use IP addresses for all hosts. Therefore there should be no DNS lookups.

The issue appears in 11.14.1 as well as 1.8 however more so in version 11.

Regards,

Ross

> Date: Fri, 21 Nov 2014 22:11:36 +0100
> From: j.a.bezemer at opensourcepartners.nl
> To: ross.beer at outlook.com
> Subject: Re: [asterisk-dev] SIP Deadlock/Pause
> 
> 
> On Fri, 21 Nov 2014, Ross Beer wrote:
> 
> > Hi All,
> >
> > I have raised an bug under https://issues.asterisk.org/jira/browse/ASTERISK-24540
> >
> > There appears to be SIP deadlock which stops registration and call setups. Asterisk doesn't crash, just stops accepting calls.
> >
> > Has anyone experienced this issue before?
> 
> Indeed. At least in 1.8, SIP signaling is singlethreaded and will wait for 
> any DNS timeout which can be quite long. Worse, if you register to a 
> provider via DNS, a DNS timeout will cause immediate retry to that same 
> server, and SIP thread will not do anything else. When DNS works again, 
> things will usually go back to normal after a while.
> 
> Quick solution: use IP addresses.
> 
> Good luck,
> Anne Bezemer
 		 	   		  
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