[Freeswitch-users] mod_erlang_event: disconnects

[Timur Irmatov]

On Thu, Jan 21, 2010 at 6:42 PM, Andrew Thompson <andrew at hijacked.us> wrote:
>> The problem is, that pretty frequently processes which handle incoming
>> calls receive messages like {'EXIT', <5406.48.0>, noconnection} from
>> FreeSWITCH. As I understand from googling, this happens when remote C
>> node disconnects (and I see TCP connections from FreeSWITCH to epmd
>> daemon being torn down and reestablished). FreeSWITCH drops calls at
>> that moment.
>
> Does it drop ALL calls being handled in erlang, or just that one?

It seems at it drops all calls handled in erlang. At the moment we
have only 7 calls maximum, and my applications logs several such exits
happening at exactly same time, up to 7 at once.

>> Have anyone seen this? Is there any fix/ advice?
>
> I haven't seen this before, how many calls are involved? I'm willing to
> help you troubleshoot though. Is there anything relevant in the logs
> (even at DEBUG)?

It is good and bad to know that you haven't seen this before.. :)
Good, because then it seems like local anomaly which, hopefully, can
be debugged and fixed. Bad, because it means we should debug it and
there's no ready fix.

As for the load, it is small. FreeSWITCH has 7 sip registrations to
our upstream, so 7 simultaneous calls is maximum.

I will send you logs offlist. This is small excerpt:

2010-01-22 16:40:00.059202 [DEBUG] mod_sofia.c:293
sofia/external/1504291 at 10.0.2.5 SOFIA DESTROY
2010-01-22 16:40:00.059202 [DEBUG] switch_core_state_machine.c:60
sofia/external/1504291 at 10.0.2.5 Standard DESTROY
2010-01-22 16:40:00.059202 [DEBUG] switch_core_state_machine.c:434
(sofia/external/1504291 at 10.0.2.5) State DESTROY going to sleep
2010-01-22 16:40:00.091201 [WARNING] mod_erlang_event.c:489 Can't
locate session df4f60c0-074a-11df-af37-b1ee9ca9c744
2010-01-22 16:40:00.091201 [DEBUG] mod_erlang_event.c:541 Notifying
new session failed
2010-01-22 16:40:00.091201 [DEBUG] mod_erlang_event.c:842
check_attached_sessions requested exit
2010-01-22 16:40:00.091201 [DEBUG] mod_erlang_event.c:920 Session
complete, waiting for children
2010-01-22 16:40:00.091201 [DEBUG] mod_erlang_event.c:930 Connection Closed
2010-01-22 16:40:00.095844 [DEBUG] mod_erlang_event.c:1723 Launching
listener, connection from node erlswitch at localhost, ip 127.0.0.1
2010-01-22 16:40:00.095844 [DEBUG] mod_erlang_event.c:910 Connection
Open from 127.0.0.1
2010-01-22 16:40:00.095844 [DEBUG] switch_core_session.c:857 Send
signal sofia/internal/sip:106 at 192.168.1.107:5060 [BREAK]
2010-01-22 16:40:00.095844 [DEBUG] switch_core_session.c:857 Send
signal sofia/internal/sip:108 at 192.168.1.108 [BREAK]
2010-01-22 16:40:00.102708 [DEBUG] switch_ivr_bridge.c:315
sofia/internal/sip:108 at 192.168.1.108 receive message [UNBRIDGE]

>> My system is Debian Lenny (5.0.3), 64-bit system, erlang installed
>> from Debian packages, no backports.
> What OTP release does that equate to, R12 or R13?

I guess this corresponds to R12B3:

$ apt-cache show erlang-nox|grep Version
Version: 1:12.b.3-dfsg-4

May be I should try to build latest erlang from source, rebuild
FreeSWITCH and see if it helps..

>Also, what FS version are you running?

'version' output in fs_cli does not reveal it's version:
freeswitch at internal> version
FreeSWITCH Version 1.0.trunk (hacked)

It was build from svn, i guess it is revision 16041.


-- 
Timur Irmatov, xmpp:irmatov at jabber.ru