From miconda@gmail.com Fri Apr 24 08:33:14 2020
From: Daniel-Constantin Mierla <miconda@gmail.com>
To: sr-users@lists.kamailio.org
Subject: Re: [SR-Users] DMQ broadcasting crashes kamailio
Date: Fri, 24 Apr 2020 08:33:06 +0200
Message-ID: <a1d9adfc-555c-2608-e9a2-2ef7dbca1018@gmail.com>
In-Reply-To:
 <CAJUJwth44ow0J=eb9zLiRcs--ug8WE9GFVO+2dZgWLCTN+g8aQ@mail.gmail.com>
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Hello,

you have to provide the version of kamailio for each reported kamailio
issue, otherwise is hard to match with the source code. Use 'kamailio
-v' to get version details.

Cheers,
Daniel

On 23.04.20 23:36, SamyGo wrote:
> Hi,
>
> Is there a way to broadcast KDMQ to the cluster but not expect a reply
> back !?as far as I've read the source code dmq_bcast_message is
> exactly like dmq_send_message in a way that it expects a callback to
> be executed on response i.e expects a reply.
>
> So, the situation I'm facing is I'm broadcasting message to cluster
> and I do not want a reply back. The following two options result in
> crash & core dump.
>
> 1 - If my script doesn't respond back, by use of dmq_handle_message,
> it marks the destined servers as "inactive" and stops usrloc sync
> process which isn't=C2=A0desirable.
> 2 - If I respond back with the dmq_handle_message it crashes the
> Kamailio which just received this broadcasted message.
>
> Here is how its done in script:
>
> *broadcasting message to cluster:*
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 dmq_bcast_message("userOnline", "$fu", "text/pl=
ain");
>
> *Receiving and handling a broadcast message:*
> route[DMQ_HANDLE] {
> =C2=A0 =C2=A0 if(!(is_method("KDMQ") || $rm =3D=3D "KDMQ")) return;
> =C2=A0 =C2=A0
> =C2=A0 =C2=A0 if(is_method("KDMQ") || $rm =3D=3D "KDMQ"){
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 if($rU =3D~ "userOnline"){
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 //use=
r came online in cluster, resume transactions
> if-any suspended
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 $avp(=
remoteUser) =3D $rb; =C2=A0 =C2=A0
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 }
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 dmq_handle_message();
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 exit;
> =C2=A0 =C2=A0 }
> }
>
> *Related log lines:*
> Apr 23 21:15:48=C2=A0 kamailio[916]: ALERT: <script>: [da2c1-2f499] ------
> DMQ_HANDLE: UserOnline Event Received ------
> Apr 23 21:15:48=C2=A0 kamailio[916]: DEBUG: dmq [message.c:53]:
> ki_dmq_handle_message_rc(): dmq_handle_message [KDMQ
> sip:userOnline(a)9.8.7.123:5060 <http://sip:userOnline(a)9.8.7.123:5060>]
> Apr 23 21:15:48=C2=A0 kamailio[916]: DEBUG: dmq [message.c:66]:
> ki_dmq_handle_message_rc(): dmq_handle_message peer found: userOnline
> Apr 23 21:15:48=C2=A0 kamailio[916]: DEBUG: <core> [core/receive.c:437]:
> receive_msg(): request-route executed in: 401461 usec
> Apr 23 21:15:48=C2=A0 kamailio[935]: DEBUG: dmq [worker.c:87]:
> worker_loop(): dmq_worker [2 935] lock acquired
> and crash/segfault..
>
> Core dump:=C2=A0https://pastebin.com/S7ekCPfF
>
> Any help or pointers to solve this would be really appreciated.
>
> Best Regards,
> Sammy
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users(a)lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

--=20
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda




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