Re: [EXTERNAL] RTPengine LTS 13.5.1.1-1 Crashes

[Richard Fuchs]

That's an assertion/exception raised by libmosquitto internally. It could indicate a bug in libmosquitto itself, or it could be some sort of usage error. Any way to reproduce this?

Cheers

On 10/11/2025 19.00, Giovanni Jose wrote:

Hello Richard,

We are having crashing issues with RTPengine version LTS 13.5.1.1-1. I'll paste the backtrace here to see if you can help us spot the issue.

#0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 tid = <optimized out> ret = 0 pd = <optimized out> old_mask = {__val = {139861290729472}} ret = <optimized out> #1 0x00007f340b0b7f4f in __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78 No locals. #2 0x00007f340b068fb2 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 ret = <optimized out> #3 0x00007f340b053472 in __GI_abort () at ./stdlib/abort.c:79 save_stage = 1 act = {__sigaction_handler = {sa_handler = 0x20, sa_sigaction = 0x20}, sa_mask = {__val = {59, 139860778384480, 18, 7, 139860778208208, 0, 0, 139861292821640, 16769742199205260800, 5, 18446744073709550248, 0, 139861529121740, 59, 139861529121904, 139861290729472}}, sa_flags = 185360207, sa_restorer = 0x7f340b1c547c <_nl_C_name>} #4 0x00007f340b053395 in __assert_fail_base (fmt=0x7f340b1c8a90 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f340cc2d470 "(mosq->msgs_out.inflight) != NULL", file=file@entry=0x7f340cc2d3cc "./lib/messages_mosq.c", line=line@entry=59, function=function@entry=0x7f340cc2d560 "message__cleanup_all") at ./assert/assert.c:94 str = 0x7f33e0037c60 "W\030=\0234\177" total = 4096 #5 0x00007f340b061ec2 in __GI___assert_fail (assertion=0x7f340cc2d470 "(mosq->msgs_out.inflight) != NULL", file=0x7f340cc2d3cc "./lib/messages_mosq.c", line=59, function=0x7f340cc2d560 "message__cleanup_all") at ./assert/assert.c:103 No locals. #6 0x00007f340cc23546 in ?? () from /lib/x86_64-linux-gnu/libmosquitto.so.1 No symbol table info available. #7 0x00007f340cc2437e in ?? () from /lib/x86_64-linux-gnu/libmosquitto.so.1 No symbol table info available. #8 0x00007f340cc24594 in mosquitto_reinitialise () from /lib/x86_64-linux-gnu/libmosquitto.so.1 No symbol table info available. #9 0x000055885e30af13 in mqtt_connect () at ./daemon/mqtt.c:50 ret = <optimized out> ret = <optimized out> __loglevel = <optimized out> __loglevel = <optimized out> __loglevel = <optimized out> __loglevel = <optimized out> __loglevel = <optimized out> __loglevel = <optimized out> __loglevel = <optimized out> #10 mqtt_loop (dummy=<optimized out>) at ./daemon/mqtt.c:103 errors = <optimized out> #11 0x000055885e247057 in thread_detach_func (d=<optimized out>) at ./daemon/helpers.c:264 __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {139860778165328, 1853129603425183531, 94044710493808, 19, 140723829904080, 139861290729472, 1853124405522802475, 5530666386598602539}, __mask_was_saved = 0}}, __pad = {0x7f33fead2eb0, 0x0, 0x0, 0x0}} __cancel_routine = 0x55885e243030 <thread_detach_cleanup> __cancel_arg = 0x55887d8fde70 __not_first_call = <optimized out> dt = <optimized out> t = <optimized out> scheduler = <optimized out> #12 0x00007f340b0b61f5 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442 ret = <optimized out> pd = <optimized out> out = <optimized out> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139861292828352, -1742783593181403349, -1368, 19, 140723829904080, 139861290729472, 1853124405547968299, 1853360546643519275}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <optimized out> #13 0x00007f340b135b40 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:100 No locals. --
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[Giovanni Jose]

It is not happening all the time - we suspect that it could be because of high loads, since it happens in production is difficult to reproduce, and it is not happening in staging or any other controlled environment