23 Apr
2020
23 Apr
'20
6:42 p.m.
Hi,
This looks like it could be a combination of a couple of things - one being
a possible bug in the DMQ code, and the other not handling the
script-generated message correctly.
If we rule out the latter first, I can take a look at the possible bug
after.
For in-script communication over DMQ you should not call
dmq_handle_message() since there will not be a registered peer/handler for
the message. The idea is to handle it in script on the receiver side
instead.
You do, however, need to call dmq_handle_message() for handling the
built-in peer notifications and module-to-module communication.
So in your case it may look something like:
if(is_method("KDMQ")){
if($rU =~ "userOnline"){
//user came online in cluster, resume transactions if-any
suspended
$avp(remoteUser) = $rb;
} else {
dmq_handle_message();
}
}
Let me know how that goes and in the meantime I will grab the core dump and
take a look into the segfault.
All the best,
Charles
On Thu, 23 Apr 2020 at 22:38, SamyGo <govoiper(a)gmail.com> wrote:
Hi,
Is there a way to broadcast KDMQ to the cluster but not expect a reply
back !?as far as I've read the source code dmq_bcast_message is exactly
like dmq_send_message in a way that it expects a callback to be executed on
response i.e expects a reply.
So, the situation I'm facing is I'm broadcasting message to cluster and I
do not want a reply back. The following two options result in crash & core
dump.
1 - If my script doesn't respond back, by use of dmq_handle_message, it
marks the destined servers as "inactive" and stops usrloc sync process
which isn't desirable.
2 - If I respond back with the dmq_handle_message it crashes the Kamailio
which just received this broadcasted message.
Here is how its done in script:
*broadcasting message to cluster:*
dmq_bcast_message("userOnline", "$fu",
"text/plain");
*Receiving and handling a broadcast message:*
route[DMQ_HANDLE] {
if(!(is_method("KDMQ") || $rm == "KDMQ")) return;
if(is_method("KDMQ") || $rm == "KDMQ"){
if($rU =~ "userOnline"){
//user came online in cluster, resume transactions
if-any suspended
$avp(remoteUser) = $rb;
}
dmq_handle_message();
exit;
}
}
*Related log lines:*
Apr 23 21:15:48 kamailio[916]: ALERT: <script>: [da2c1-2f499] ------
DMQ_HANDLE: UserOnline Event Received ------
Apr 23 21:15:48 kamailio[916]: DEBUG: dmq [message.c:53]:
ki_dmq_handle_message_rc(): dmq_handle_message [KDMQ
sip:userOnline@9.8.7.123:5060]
Apr 23 21:15:48 kamailio[916]: DEBUG: dmq [message.c:66]:
ki_dmq_handle_message_rc(): dmq_handle_message peer found: userOnline
Apr 23 21:15:48 kamailio[916]: DEBUG: <core> [core/receive.c:437]:
receive_msg(): request-route executed in: 401461 usec
Apr 23 21:15:48 kamailio[935]: DEBUG: dmq [worker.c:87]: worker_loop():
dmq_worker [2 935] lock acquired
and crash/segfault..
Core dump: https://pastebin.com/S7ekCPfF
Any help or pointers to solve this would be really appreciated.
Best Regards,
Sammy
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