I will try and capture a failure with high verbosity enabled, although I doubt its DNS as I have had the same issue using an IP address in the URI as well as using a domain name in it…. From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Brandon Armstead Sent: 01 February 2015 05:21 To: Kamailio (SER) - Users Mailing List Subject: Re: [SR-Users] What could cause an intermittent fault (28) with http_query()? What happens if you run the daemon in foreground / high verbosity ? Paste error logs back here. My guess would be there is some kind of blocking happening, ie DNS lookup possibly try using an alternate resolver ? Sent from my iPhone On Jan 30, 2015, at 10:19 AM, Tim Chubb <tim.chubb@voicesimplified.com<mailto:tim.chubb@voicesimplified.com>> wrote: Hi All I seem to be experiencing an intermittent fault with the utils http_query() method. We are implementing a routing and white list component that is accessed via a REST api, however i have observed several occasions where this is logged: Jan 30 16:04:17 vs-kam-prod02 /usr/local/sbin/kamailio[13184]: ERROR: utils [functions.c:149]: http_query(): failed to perform curl (28) The indicated error number (28) seems to suggest a timeout is occurring with curl, however examining a capture of network traffic when this happens shows that a http request is not sent from the server to the destination at all, usually attempting a second call results in everything working correctly. As stated its intermittent in its nature and so I cannot reliably trigger this issue, other than through sheer repetition, so any ideas as to what could be causing this issue would be gratefully received, _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org<mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users