New subject: pua_dialoginfo publish sent without recieved etag (intermittent)

17 Oct 2015

Hi All,

I've come accross an intermittent issue where an initial publish is sent 
to our presence server, proxy recieves the subsequent 200 with etag, but 
the following publish sent does not contain the sip-if-match header of 
the recieved 200, which ends up causing trouble with BLF on our test 
devices, it also has the added side affect of not being cleared out of 
the presentity table, these entries need to be manually removed.

This does not occur all the time, I can use the same phone and make 
several calls before this issue occurs. It is not limited to a device 
type, we've tried with panasonic, polycom, cisco, zoiper, yealink and 
linksys devices, all exhibit the same sporadic behaviour.

I've attached an example sip trace of the publish messages where this 
happens, you can see the second publish doesnt have the sip-if-match 
header whose content should be that of the sip-etag in the previous 200 
to the initial publish.

I'm not sure if there is something I am misunderstanding here, a 
configuration issue, or if this is indeed a bug.

Both the proxy and the presence server are running kamailio v4.3.3.

Any pointers/suggestions/guidance would be appreciated.

If you need any additional info, please dont hesitate to ask.

Thanks