[SR-Users] Unexpected BYEs from dialog module

[Alex Balashov]

Hi,

I am running 4.3.5:1b0c0a, which I am aware is an EOL'd release train,
and have a problem with the dialog module I am baffled by.

On many calls - I can't find any correlation to particular kinds of
endpoints - I see spoofed BYEs come out of Kamailio after a minute and a
half, as if the call had hit a dialog timeout or the dialog module's
dead peer detection (OPTIONS pinging) kicked it out.

The thing is, neither of those explanations seem to be borne out by the
parameters of the calls under investigation. The dialog timeout on these
calls is set to 7200, and the dialog keepalives aren't enabled in either
direction. If they were, it'd be logged.

Calls that are terminated in this manner also see the following log
message:

  WARNING: dialog [dlg_req_within.c:214]: bye_reply_cb(): inconsitent 
  dlg timer data on dlg 0x7f9997317e48 [3390:9644] with clid 
  '1996679936_133218050 at x.x.x.x' and tags '2bb17663-co4006-INS001' 'as7925780d'

But I don't think this is unusual for a dialog-spoofed BYE; presumably
this is due to a 200 OK for the BYE from both ends.

So anyway, I am trying to track down anything else that could
inadvertently cause dialog to hang up calls relatively quickly in that
release, or inadvertently set the dialog timeout parameter to something
lower than is apparent from the logging and the config. 

If anyone has any pointers, that would not go unappreciated!

Many thanks,

-- Alex

-- 
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) 
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/