From the build log
```
CC (gcc) [M kazoo.so] kazoo.o
CC (gcc) [M kazoo.so] kz_amqp.o
kz_amqp.c: In function 'kz_amqp_connection_open_ssl':
kz_amqp.c:857:17: warning: 'amqp_set_initialize_ssl_library' is deprecated [-Wdeprecated-declarations]
857 | amqp_set_initialize_ssl_library(1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from kz_amqp.c:37:
/usr/include/rabbitmq-c/ssl_socket.h:233:16: note: declared here
233 | void AMQP_CALL amqp_set_initialize_ssl_library(amqp_boolean_t do_initialize);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CC (gcc) [M kazoo.so] kz_fixup.o
CC (gcc) [M kazoo.so] kz_hash.o
```
Functions description in the header file
https://github.com/alanxz/rabbitmq-c/blob/v0.13.0/include/rabbitmq-c/ssl_so…
```
/**
* Sets whether rabbitmq-c will initialize OpenSSL.
*
* \deprecated Since v0.13.0 this is a no-op. OpenSSL automatically manages
* library initialization and uninitialization.
*
* OpenSSL requires a one-time initialization across a whole program, this sets
* whether or not rabbitmq-c will initialize the SSL library when the first call
* to amqp_ssl_socket_new() is made. You should call this function with
* do_init = 0 if the underlying SSL library is initialized somewhere else
* the program.
*
* Failing to initialize or double initialization of the SSL library will
* result in undefined behavior
*
* By default rabbitmq-c will initialize the underlying SSL library.
*
* NOTE: calling this function after the first socket has been opened with
* amqp_open_socket() will not have any effect.
*
* \param [in] do_initialize If 0 rabbitmq-c will not initialize the SSL
* library, otherwise rabbitmq-c will initialize the
* SSL library
*
* \since v0.4.0
*/
```
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When relaying this `200 OK` repeatedly with calls to `rtpengine_answer()` failing because all RTPEngines in a set are unreachable...
```
Dec 8 06:24:38 gw kamailio[4823]: ERROR: rtpengine [rtpengine.c:2960]: select_rtpp_node(): rtpengine failed to select new for calllen=36 callid=8279a4ea-151e-48de-a23c-5840104126de
```
```
SIP/2.0 200 OK
v:SIP/2.0/UDP 10.150.20.20;branch=z9hG4bK03e.e4da444e627bb575ef4f46151729a1fa.0,SIP/2.0/UDP 10.151.20.108;received=10.151.20.108;rport=5060;branch=z9hG4bKKQyrBKpp04X0K
Record-Route:<sip:10.150.20.20;lr;ftag=emHm2apy95jFe;rtp_relay=1;rtp_group=0>
f:"14045551212"<sip:14045551212@10.151.20.108>;tag=emHm2apy95jFe
t:<sip:16782001111@internal.evaristesys.com>;tag=tHQt0rDcF7UHK
i:8279a4ea-151e-48de-a23c-5840104126de
CSeq:60686471 INVITE
m:<sip:16782001111@10.160.10.55:5060;transport=udp>
User-Agent:VoiceAppServer
Allow:INVITE,ACK,BYE,CANCEL,OPTIONS,MESSAGE,INFO,UPDATE,REFER,NOTIFY
k:path,replaces
u:talk,hold,conference,refer
c:application/sdp
Content-Disposition:session
l:257
v=0
o=DM 1670428117 1670428118 IN IP4 10.160.10.55
s=DM
c=IN IP4 10.160.10.55
t=0 0
m=audio 52418 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=rtcp:52419 IN IP4 10.160.10.55
```
Repeat INVITEs eventually result in a crash. This backtrace is taken from a different server but identical scenario:
```
#0 t_should_relay_response (Trans=0x7f4aee56ba80, new_code=200, branch=0, should_store=0x7ffd8b8bbba0, should_relay=0x7ffd8b8bbba4, cancel_data=0x7ffd8b8bbe40,
reply=0x7f4afe40df70) at t_reply.c:1285
1285 && !(inv_through && Trans->uac[branch].last_received<300)) {
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.192.el6.x86_64 jansson-2.11-1.el6.x86_64 keyutils-libs-1.4-5.el6.x86_64 krb5-libs-1.10.3-57.el6.x86_64 libcom_err-1.41.12-22.el6.x86_64 libev-4.03-3.el6.x86_64 libselinux-2.0.94-7.el6.x86_64 libunistring-0.9.3-5.el6.x86_64 openssl-1.0.1e-48.el6_8.3.x86_64 sqlite-3.6.20-1.el6_7.2.x86_64 zlib-1.2.3-29.el6.x86_64
(gdb) where
#0 t_should_relay_response (Trans=0x7f4aee56ba80, new_code=200, branch=0, should_store=0x7ffd8b8bbba0, should_relay=0x7ffd8b8bbba4, cancel_data=0x7ffd8b8bbe40,
reply=0x7f4afe40df70) at t_reply.c:1285
#1 0x00007f4afd73ab7d in relay_reply (t=0x7f4aee56ba80, p_msg=0x7f4afe40df70, branch=0, msg_status=200, cancel_data=0x7ffd8b8bbe40, do_put_on_wait=1)
at t_reply.c:1821
#2 0x00007f4afd740c38 in reply_received (p_msg=0x7f4afe40df70) at t_reply.c:2558
#3 0x00000000004b5d6a in do_forward_reply (msg=0x7f4afe40df70, mode=0) at core/forward.c:747
#4 0x00000000004b78c9 in forward_reply (msg=0x7f4afe40df70) at core/forward.c:852
#5 0x000000000054982b in receive_msg (
buf=0xb27700 "SIP/2.0 200 OK\r\nv:SIP/2.0/UDP xxx;branch=z9hG4bK9915.dcfe6d03cb21e6c94a6705adb095c566.0,SIP/2.0/UDP xxx;received=xxx;rport=5060;branch=z9hG4bKZmZp0NZv3FvQB\r\nRecord-Rout"..., len=984, rcv_info=0x7ffd8b8bc6c0) at core/receive.c:434
#6 0x00000000006658ca in udp_rcv_loop () at core/udp_server.c:541
#7 0x000000000042500f in main_loop () at main.c:1655
#8 0x000000000042c5bb in main (argc=11, argv=0x7ffd8b8bcc88) at main.c:2696
```
Looks like in the crash frame, `Trans->uac` is `NULL`:
```
(gdb) frame 0
#0 t_should_relay_response (Trans=0x7f4aee56ba80, new_code=200, branch=0, should_store=0x7ffd8b8bbba0, should_relay=0x7ffd8b8bbba4, cancel_data=0x7ffd8b8bbe40,
reply=0x7f4afe40df70) at t_reply.c:1285
1285 && !(inv_through && Trans->uac[branch].last_received<300)) {
(gdb) print Trans->uac
$1 = (struct ua_client *) 0x0
```
I have seen this crash from time to time, though it is infrequent. It always seems to occur when there are problems reaching RTPEngine in a timely fashion.
This is on Kamailio 5.2.4:de9a03, which I know has long fallen off the back of the maintenance train. However, line 1386 of `t_reply.c` in `master:HEAD` shows that the code is no different now:
https://github.com/kamailio/kamailio/blob/master/src/modules/tm/t_reply.c#L…
Of course, it's possible that something upstream has changed so as to prevent this state. Otherwise, I suppose a null pointer safety check for `Trans->uac` is recommended. I'd be happy to submit a patch, just wasn't sure if the feeling was more that this should be resolved higher up the call stack.
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Hi
there is an issue with the SIP parser for the t_uac_send function
https://www.kamailio.org/docs/modules/devel/modules/tm.html#tm.f.t_uac_send
If I call this function for example:
t_uac_send("INVITE", "sip:test@123.123.123.123:5060", "", "" ,"Content-Type: text/plain\r\nContact: <sip:85951b3d-096c-95d6-5f05-4f38095aca9f@172.17.64.120:5060;transport=tcp>;+u.sip!devicename.ccm.cisco.com=\"SEP5486BC7F2BBC\"", "Testbody")
Then the resulting request is broken - it's probably due to a character (exclamation mark?) in the Contact header.... I tested it with a call from kemi, but it probably also occurs when you run it with a normal kamailio -script tests
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Situation: Two Kamailio nodes syncing dialog profiles via DMQ
Observation: When a dialog timeout is encountered, about half of the time, the timeout is triggered on the peer node not handling the dialog preventing the call to be correctly terminated and also leaving entries in the dialog database which never get deleted.
https://kamailio.org/docs/modules/5.7.x/modules/dialog.html#dialog.p.enable…
Makes clear, that only the node which is handling the dialog in question, can make changes not related to the dialog profiles. So when a dialog times out, it is this node which has to trigger the timeout, not any other one.
When looking at the source code, it is clear, that the 'lifetime' is transmitted via DMQ dialog message to the peer nodes, which in turn arm a timer. So it is obvious, this time will trigger, sometimes before the instance handling the dialog itself triggers that timer.
With some assistance of @oej I found a way to alter the JSON payload to extend the lifetime on the peer nodes:
```
route[DMQ_CAPTURE]
{
if(is_method("KDMQ"))
{
if(has_body("application/json") && $fU == 'dialog')
{
if (jansson_get("lifetime", $rb, "$var(lifetime)"))
{
$var(new_lifetime) = $var(lifetime) + 60; # Add 60 seconds on DMQ peer to make sure it expires AFTER main node.
$var(newrb) = $rb;
jansson_set("integer", "lifetime", $var(new_lifetime), "$var(newrb)");
set_body("$var(newrb)","application/json");
msg_apply_changes();
}
}
dmq_handle_message();
exit;
}
}
```
Testing with this config fixed the issue of the timeout firing on a peer node instead of the node handling the dialog.
Issue is present in 5.5, 5.6 and after looking at the code, I assume also on 5.7
-Benoît
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Hi,
I think there is an issue with writing CDRs on failover scenarios.
I have two servers with Kamailio. Both server running Debian 11 (bulleye) and latest Kamailio 5.6.1 from git.
I'm using DMQ to sync dialogs and htable between these servers, so both servers have the same knowledge of dialog state. Both Kamailio uses nobind option, so I can switch a VIP from one server to the other one. This is managed with keepalived. Switching the VIP from one server the other one works fine an while a call is running I can switch the VIP. I can see that the BYE Message is handled OK after I made a switch. I can see that acc is triggered but what is missing is acc_cdr in this case.
I'm using htable to fill all necessary variables to complete the CDR an I can see that all values are synced correctly.
The acc_cdr is created fine if there is no failover so i think it can't be an configuration issue.
Both server holds the same Kamailio configuration except the IP.
`version: kamailio 5.6.1 (x86_64/linux) bfc5c2-dirty
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: bfc5c2 -dirty
compiled with gcc 10.2.1`
`root@voip-lab-proxy01:~# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 11 (bullseye)
Release: 11
Codename: bullseye`
`root@voip-lab-proxy01:~# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 38 bits physical, 48 bits virtual
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 23
Model name: Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
Stepping: 10
CPU MHz: 2500.088
BogoMIPS: 5000.17
Virtualization: VT-x
Hypervisor vendor: KVM
Virtualization type: full
L1d cache: 128 KiB
L1i cache: 128 KiB
L2 cache: 16 MiB
L3 cache: 16 MiB
NUMA node0 CPU(s): 0-3
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Mitigation; PTE Inversion; VMX EPT disabled
Vulnerability Mds: Vulnerable: Clear CPU buffers attempted, no microcode; SMT Host state unknown
Vulnerability Meltdown: Mitigation; PTI
Vulnerability Mmio stale data: Unknown: No mitigations
Vulnerability Retbleed: Not affected
Vulnerability Spec store bypass: Vulnerable
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Retpolines, STIBP disabled, RSB filling, PBRSB-eIBRS Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx pdpe1gb lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid
tsc_known_freq pni vmx ssse3 cx16 pdcm sse4_1 x2apic tsc_deadline_timer xsave hypervisor lahf_lm cpuid_fault pti tpr_shadow vnmi flexpriority vpid tsc_adjust arat arch_capabilit
ies`
If you need more information, please let me know. As I'm running this on a test system I can reproduce the issue at any time.
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#### Pre-Submission Checklist
- [x] Commit message has the format required by CONTRIBUTING guide
- [x] Commits are split per component (core, individual modules, libs, utils, ...)
- [x] Each component has a single commit (if not, squash them into one commit)
- [x] No commits to README files for modules (changes must be done to docbook files
in `doc/` subfolder, the README file is autogenerated)
#### Type Of Change
- [ ] Small bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds new functionality)
- [ ] Breaking change (fix or feature that would change existing functionality)
#### Checklist:
- [ ] PR should be backported to stable branches
- [x] Tested changes locally
- [x] Related to issue #3667
#### Description
Allow creating Record-Route and Via header using destination address and port in the haproxy protocol header.
PR created behalf @ivanuschak
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/3731
-- Commit Summary --
* core: extented haproxy protocol parser
* rr: extented haproxy protocol suppport
* path: extented haproxy protocol suppport
* websocket: extented haproxy protocol suppport
* siptrace: extented haproxy protocol suppport
-- File Changes --
M src/core/forward.h (4)
M src/core/msg_translator.c (137)
M src/core/parser/msg_parser.h (1)
M src/core/receive.c (6)
M src/core/receive.h (3)
M src/core/tcp_conn.h (1)
M src/core/tcp_main.c (22)
M src/core/tcp_read.c (20)
M src/modules/path/path.c (2)
M src/modules/rr/loose.c (4)
M src/modules/rr/record.c (6)
M src/modules/siptrace/siptrace.c (89)
M src/modules/websocket/ws_frame.c (9)
M src/modules/websocket/ws_handshake.c (3)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/3731.patchhttps://github.com/kamailio/kamailio/pull/3731.diff
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<!-- Kamailio Pull Request Template -->
<!--
IMPORTANT:
- for detailed contributing guidelines, read:
https://github.com/kamailio/kamailio/blob/master/.github/CONTRIBUTING.md
- pull requests must be done to master branch, unless they are backports
of fixes from master branch to a stable branch
- backports to stable branches must be done with 'git cherry-pick -x ...'
- code is contributed under BSD for core and main components (tm, sl, auth, tls)
- code is contributed GPLv2 or a compatible license for the other components
- GPL code is contributed with OpenSSL licensing exception
-->
#### Pre-Submission Checklist
<!-- Go over all points below, and after creating the PR, tick all the checkboxes that apply -->
<!-- All points should be verified, otherwise, read the CONTRIBUTING guidelines from above-->
<!-- If you're unsure about any of these, don't hesitate to ask on sr-dev mailing list -->
- [X] Commit message has the format required by CONTRIBUTING guide
- [X] Commits are split per component (core, individual modules, libs, utils, ...)
- [X] Each component has a single commit (if not, squash them into one commit)
- [X] No commits to README files for modules (changes must be done to docbook files
in `doc/` subfolder, the README file is autogenerated)
#### Type Of Change
- [ ] Small bug fix (non-breaking change which fixes an issue)
- [X] New feature (non-breaking change which adds new functionality)
- [ ] Breaking change (fix or feature that would change existing functionality)
#### Checklist:
<!-- Go over all points below, and after creating the PR, tick the checkboxes that apply -->
- [ ] PR should be backported to stable branches
- [X] Tested changes locally
- [ ] Related to issue #XXXX (replace XXXX with an open issue number)
#### Description
Not for merging yet.
Package tls_wolfssl as an alternative to OpenSSL 3.x.
Depends on PR https://github.com/kamailio/kamailio/pull/3590
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/3592
-- Commit Summary --
* pkg: RPM packaging add kamailio-tls_wolfssl subpackage
-- File Changes --
M pkg/kamailio/obs/kamailio.spec (18)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/3592.patchhttps://github.com/kamailio/kamailio/pull/3592.diff
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### Description
Hi, I ran into an issue where the Kamailio service seemingly froze (didn't crash, but failed to receive and deliver calls) while running, I went through the logs a little bit, and saw the same log pattern (pasted below) recouring every few months or so, on an older installation (5.2.0). Usually, it ended up automatically restarting the service. But not this time, I had to reload it manually to make the service work again.
Is this a known issue?
How can I make sure that the service will be able to restart the next time it happens?
Edward
### Troubleshooting
#### Debugging Data
<!--
If you got a core dump, use gdb to extract troubleshooting data - full backtrace,
local variables and the list of the code at the issue location.
gdb /path/to/kamailio /path/to/
bt full
info locals
list
If you are familiar with gdb, feel free to attach more of what you consider to
be relevant.
-->
```
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/local/sbin/kamailio...done.
warning: exec file is newer than core file.
[New LWP 11413]
Core was generated by `kamailio'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00007f4e4a52e428 in ?? ()
(gdb) Quit
(gdb) bt full
#0 0x00007f4e4a52e428 in ?? ()
No symbol table info available.
#1 0x00007f4e4a53002a in ?? ()
No symbol table info available.
#2 0x0000000000000020 in ?? ()
No symbol table info available.
#3 0x0000000000000000 in ?? ()
No symbol table info available.
(gdb) info locals
No symbol table info available.
(gdb) list
1871 & now if we don't need it */
1872 #ifdef USE_SLOW_TIMER
1873 + 1 /* slow timer process */
1874 #endif
1875 #ifdef USE_TCP
1876 +((!tcp_disable)?( 1/* tcp main */ + tcp_listeners ):0)
1877 #endif
1878 #ifdef USE_SCTP
1879 +((!sctp_disable)?sctp_listeners:0)
1880 #endif
(gdb)
```
#### Log Messages
<!--
Check the syslog file and if there are relevant log messages printed by Kamailio, add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site).
-->
```
Jun 28 16:35:22 kamprodegres kamailio: INFO: <core> [core/sctp_core.c:74]: sctp_core_check_support(): SCTP API not enabled - if you want to use it, load sctp module
Jun 28 16:35:22 kamprodegres kamailio: WARNING: <core> [core/socket_info.c:1394]: fix_hostname(): could not rev. resolve 70.36.25.87
Jun 28 16:35:22 kamprodegres kamailio: WARNING: <core> [core/socket_info.c:1394]: fix_hostname(): could not rev. resolve 70.36.25.87
Jun 28 16:35:22 kamprodegres kamailio: INFO: <core> [core/tcp_main.c:5042]: init_tcp(): using epoll_lt as the io watch method (auto detected)
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: jsonrpcs [jsonrpcs_sock.c:197]: jsonrpc_dgram_mod_init(): the socket /var/run/kamailio/kamailio_rpc.sock already exists, trying to delete it...
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: rr [../outbound/api.h:52]: ob_load_api(): unable to import bind_ob - maybe module is not loaded
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: rr [rr_mod.c:177]: mod_init(): outbound module not available
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [main.c:2779]: main(): processes (at least): 40 - shm size: 67108864 - pkg size: 8388608
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992
Jun 28 16:35:22 kamprodegres kamailio[8489]: INFO: <core> [core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984
Jun 28 16:35:22 kamprodegres kamailio[8518]: INFO: jsonrpcs [jsonrpcs_sock.c:443]: jsonrpc_dgram_process(): a new child 0/8518
Jun 28 16:35:22 kamprodegres kamailio[8519]: INFO: ctl [io_listener.c:214]: io_listen_loop(): io_listen_loop: using epoll_lt io watch method (config)
Jun 29 18:13:37 kamprodegres kamailio[8513]: INFO: {1 581461 CANCEL 402954192_49936786(a)67.231.13.146} tm [t_reply.c:478]: _reply_light(): can't generate 487 reply when a final 404 was sent out
Jun 29 18:27:00 kamprodegres kamailio[8508]: INFO: {1 211236 CANCEL 405019408_127896329(a)67.231.13.146} tm [t_reply.c:478]: _reply_light(): can't generate 487 reply when a final 404 was sent out
Jun 29 18:51:10 kamprodegres /usr/local/sbin/kamailio[2269]: NOTICE: <core> [main.c:725]: handle_sigs(): Thank you for flying kamailio!!!
Jun 29 18:51:10 kamprodegres /usr/local/sbin/kamailio[2326]: INFO: <core> [main.c:847]: sig_usr(): signal 15 received
```
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.3.2 (x86_64/linux) 7ba545
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 7ba545
compiled on 16:37:32 Jun 14 2020 with gcc 5.4.0
```
* **Operating System**:
<!--
Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
Kernel details (output of `uname -a`)
-->
```
Ubuntu 16.04
```
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