Regards,

Sebastian

On Fri, Jan 12, 2018 at 11:08 AM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

have you checked that any of the route blocks used in between lock() and unlock() don't do an exit/drop (also not return 0)?

Do you have other lock() / unlock() in the config?

Cheers,
Daniel

On 12.01.18 08:49, Sebastian Damm wrote:
Hi,

this morning, two Kamailio servers suddenly stopped working after having worked without a problem for months. Both are running 5.0.2 on Debian Jessie. Those systems only analyze mirrored traffic and write some information to a RabbitMQ.

I tried restarting, but after a few seconds they get stuck the same way as before. Then I attached a gdb to some of the UDP listeners, and they all look pretty much the same.

===========8< process 1 =================

(gdb) bt

#0 0x00007f404ca435b9 in syscall () from /lib/x86_64-linux-gnu/libc.so.6

#1 0x00007f4049f41260 in futex_get (lock=0x7f4041bccd00) at ../../core/parser/../mem/../futexlock.h:108

#2 0x00007f4049f477d7 in cfg_lock_helper (lkey=0x7fff3c048650, mode=0) at cfgutils.c:667

#3 0x00007f4049f481ed in w_cfg_lock_wrapper (msg=0x7f404ba17f18, key=0x7f404ba15488, mode=0) at cfgutils.c:712

#4 0x00007f4049f4823c in w_cfg_lock (msg=0x7f404ba17f18, key=0x7f404ba15488 "\210a\241K@\177", s2=0x0) at cfgutils.c:717

#5 0x000000000045cd85 in do_action (h=0x7fff3c049410, a=0x7f404b9d5170, msg=0x7f404ba17f18) at core/action.c:1060

#6 0x0000000000469afa in run_actions (h=0x7fff3c049410, a=0x7f404b9d5170, msg=0x7f404ba17f18) at core/action.c:1552

#7 0x000000000045958d in do_action (h=0x7fff3c049410, a=0x7f404b9ce558, msg=0x7f404ba17f18) at core/action.c:678

#8 0x0000000000469afa in run_actions (h=0x7fff3c049410, a=0x7f404b9cdf70, msg=0x7f404ba17f18) at core/action.c:1552

#9 0x000000000046a2bd in run_top_route (a=0x7f404b9cdf70, msg=0x7f404ba17f18, c=0x0) at core/action.c:1641

#10 0x0000000000580033 in receive_msg (

buf=0xa393f9 <buf+121> "REGISTER sip:domain SIP/2.0\r\nVia: SIP/2.0/UDP 1.2.3.4;branch=z9hG4bKfc98.c762d7151f110c7eb71fc7d4e0648f1f.0\r\nVia: SIP/2.0/UDP 192.168.0.3:5060;rport=38020;received=62.30.8.128;branch=z9hG4"...,

len=799, rcv_info=0x7fff3c049810) at core/receive.c:264

#11 0x00007f40483efcdf in parsing_hepv3_message (buf=0xa39380 <buf> "HEP3\003\230", len=920) at hep.c:499

#12 0x00007f40483ee264 in hepv3_received (buf=0xa39380 <buf> "HEP3\003\230", len=920, ri=0x7fff3c049a50) at hep.c:231

#13 0x00007f40483ec9cb in hep_msg_received (data=0x7fff3c049a30) at hep.c:85

#14 0x000000000049e4e1 in sr_event_exec (type=7, data=0x7fff3c049a30) at core/events.c:263

#15 0x000000000048731a in udp_rcv_loop () at core/udp_server.c:466

#16 0x0000000000422d08 in main_loop () at main.c:1623

#17 0x000000000042a408 in main (argc=13, argv=0x7fff3c049ef8) at main.c:2643

(gdb) quit

===========8< process 1 =================

===========8< process 2 =================

(gdb) bt

#0 0x00007f404ca435b9 in syscall () from /lib/x86_64-linux-gnu/libc.so.6

#1 0x00007f4049f41260 in futex_get (lock=0x7f4041bccd00) at ../../core/parser/../mem/../futexlock.h:108

#2 0x00007f4049f477d7 in cfg_lock_helper (lkey=0x7fff3c048650, mode=0) at cfgutils.c:667

#3 0x00007f4049f481ed in w_cfg_lock_wrapper (msg=0x7f404ba17f18, key=0x7f404ba15488, mode=0) at cfgutils.c:712

#4 0x00007f4049f4823c in w_cfg_lock (msg=0x7f404ba17f18, key=0x7f404ba15488 "\210a\241K@\177", s2=0x0) at cfgutils.c:717

#5 0x000000000045cd85 in do_action (h=0x7fff3c049600, a=0x7f404b9d5170, msg=0x7f404ba17f18) at core/action.c:1060

#6 0x0000000000469afa in run_actions (h=0x7fff3c049600, a=0x7f404b9d5170, msg=0x7f404ba17f18) at core/action.c:1552

#7 0x000000000045958d in do_action (h=0x7fff3c049600, a=0x7f404b9cf920, msg=0x7f404ba17f18) at core/action.c:678

#8 0x0000000000469afa in run_actions (h=0x7fff3c049600, a=0x7f404b9ce9c0, msg=0x7f404ba17f18) at core/action.c:1552

#9 0x000000000046a2bd in run_top_route (a=0x7f404b9ce9c0, msg=0x7f404ba17f18, c=0x7fff3c049600) at core/action.c:1641

#10 0x0000000000580a69 in receive_msg (

buf=0xa393f9 <buf+121> "SIP/2.0 200 OK\r\nVia: SIP/2.0/UDP 172.20.40.8;branch=z9hG4bKa69c.5cca5a54c4d270c515eeb4bbb5e0bb44.0\r\nVia: SIP/2.0/UDP 2.3.4.5:5060\r\nContact: <sip:1234567@9.8.7.6:59669;transport=UDP>\r\nTo: "..., len=506, rcv_info=0x7fff3c049810) at core/receive.c:327

#11 0x00007f40483efcdf in parsing_hepv3_message (buf=0xa39380 <buf> "HEP3\002s", len=627) at hep.c:499

#12 0x00007f40483ee264 in hepv3_received (buf=0xa39380 <buf> "HEP3\002s", len=627, ri=0x7fff3c049a50) at hep.c:231

#13 0x00007f40483ec9cb in hep_msg_received (data=0x7fff3c049a30) at hep.c:85

#14 0x000000000049e4e1 in sr_event_exec (type=7, data=0x7fff3c049a30) at core/events.c:263

#15 0x000000000048731a in udp_rcv_loop () at core/udp_server.c:466

#16 0x0000000000422d08 in main_loop () at main.c:1623

#17 0x000000000042a408 in main (argc=13, argv=0x7fff3c049ef8) at main.c:2643

(gdb) quit

===========8< process 2 =================

Looks to me as if Kamailio gets stuck trying to get a lock for this packet.

The config file when handling those packets looks like this:

request_route {

route(initialize_variables);

route(foo);

}

onreply_route {

route(initialize_variables);

route(foo);

}

route[initialize_variables] {

$vn(bar) = $null;

$vn(baz) = $null;

$vn(barbaz) = $null;

$vn(foobar) = $null;

}

route[foo] {

lock("$ci");

xlog("L_DBG", "Obtained lock, calling lua...\n");

if(!lua_run("handle_packet")) {

xlog("L_ERR", "SCRIPT: failed to execute lua function!\n");

}

if ($vn(bar) != $null) {

route(mediaIpToRedis);

}

if ($vn(baz) != $null) {

route(channelInfoToRedis);

}

if ($vn(barbaz) != $null) {

route(sendToQueue);

}

xlog("L_DBG", "All finished, releasing lock...\n");

unlock("$ci");

xlog("L_DBG", "Released lock...\n");

# update stats

if ($vn(foobar) != $null) {

update_stat("$vn(foobar)", "+1");

}

drop;

exit;

}

Is there any race condition I am missing? Until this morning, it ran without problems and only every 2 minutes or so, 4 packets were sent to the RabbitMQ. So the system throws away nearly 100% of the traffic (which is around 20 Mbit).

In the log file, there are no errors at all, no aborted lua scripts or whatsoever.

Does anybody have a hint for me? Thanks in advance.

Regards

Sebastian
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-- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com