crash at `kurento::MediaElementImpl::mediaFlowInStateChange`

[darrenhp]

Prerequisites

• [x] I have read the SUPPORT document

root@kurento-online-bj-2020061005:/var/crash/1# apt list|grep kurento-dbg

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

kurento-dbg/bionic 6.14.0-0kurento1.18.04 amd64

• [x] I have checked the Troubleshooting Guide

• [] I have tested with the latest version of Kurento

Issue description

Segmentation fault (thread 140681564055296, pid 9488)
Stack trace:
[__nss_passwd_lookup]
sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S:244
[std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6:0x126AC8
[std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > > >::_M_get_insert_hint_unique_pos(std::_Rb_tree_const_iterator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)]
/usr/include/c++/7/bits/stl_tree.h:2152
[std::_Rb_tree_iterator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > > std::_Rb_tree<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> >, std::_Select1st<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > > >::_M_emplace_hint_unique<std::piecewise_construct_t const&, std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>, std::tuple<> >(std::_Rb_tree_const_iterator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::shared_ptr<kurento::MediaFlowState> > >, std::piecewise_construct_t const&, std::tuple<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>&&, std::tuple<>&&) [clone .isra.449]]
/usr/include/c++/7/bits/stl_tree.h:2404
[kurento::MediaElementImpl::mediaFlowInStateChange(int, char*, KmsElementPadType)]
/usr/include/c++/7/bits/stl_map.h:493
[void kurento::signal_handler_adaptor<void, _GstElement*, int, char*, KmsElementPadType>(_GstElement*, int, char*, KmsElementPadType, void*)]
/usr/include/c++/7/bits/shared_ptr_base.h:684
[g_closure_invoke]
gobject/gclosure.c:811 (discriminator 2)
[accumulate]
gobject/gsignal.c:3140
[g_signal_emit_valist]
gobject/gsignal.c:3419 (discriminator 1)
[g_signal_emit]
gobject/gsignal.c:3449
[check_if_flow_media]
./src/gst-plugins/commons/./src/gst-plugins/commons/kmselement.c:616
[g_timeout_dispatch]
glib/gmain.c:4653
[g_main_dispatch]
glib/gmain.c:3180
[g_main_context_iterate]
glib/gmain.c:3902
[g_main_loop_run]
glib/gmain.c:4097
[loop_thread_init]
./src/gst-plugins/commons/./src/gst-plugins/commons/kmsloop.c:105

Context

How to reproduce?

I don't know

Expected & current behavior

(Optional) Possible solution

INFO about Kurento Media Server

• Kurento version: 6.14.0
• Server OS: 18.04 (Bionic)
• Installation method:
  • [x] apt-get
  • [] Docker
  • [] AWS
  • [] Built from sources

INFO about your Application Server

• Language: Java
• Kurento Client version:

INFO about end-user clients

• Device(s):
• OS(es):
• Browser(s):

INFO about your environment

Commands output

root@kurento-online-bj-2020061005:/var/crash/1# kurento-media-server --version
Kurento Media Server version: 6.14.0
Found modules:
	'core' version 6.14.0
	'elements' version 6.14.0
	'filters' version 6.14.0
root@kurento-online-bj-2020061005:/var/crash/1#
root@kurento-online-bj-2020061005:/var/crash/1# dpkg -l | grep -Pi 'kurento|kms-|gst.*1.5|nice'
ii  gstreamer1.5-libav:amd64               1.8.1-1kurento1.18.04                           amd64        libav plugin for GStreamer
ii  gstreamer1.5-nice:amd64                0.1.17-0kurento1.18.04                          amd64        ICE library (GStreamer 1.5 plugin)
ii  gstreamer1.5-plugins-bad:amd64         1.8.1-1kurento4.18.04                           amd64        GStreamer plugins from the "bad" set
ii  gstreamer1.5-plugins-base:amd64        1.8.1-1kurento2.18.04                           amd64        GStreamer plugins from the "base" set
ii  gstreamer1.5-plugins-good:amd64        1.8.1-1kurento4.18.04                           amd64        GStreamer plugins from the "good" set
ii  gstreamer1.5-plugins-ugly:amd64        1.8.1-1kurento1.18.04                           amd64        GStreamer plugins from the "ugly" set
ii  gstreamer1.5-pulseaudio:amd64          1.8.1-1kurento4.18.04                           amd64        GStreamer plugin for PulseAudio
ii  kms-core                               6.14.0-0kurento1.18.04                          amd64        Kurento Core module
ii  kms-elements                           6.14.0-0kurento1.18.04                          amd64        Kurento Elements module
ii  kms-filters                            6.14.0-0kurento1.18.04                          amd64        Kurento Filters module
ii  kms-jsonrpc                            6.14.0-0kurento1.18.04                          amd64        Kurento JSON-RPC library
ii  kmsjsoncpp                             1.6.3-1kurento1.18.04                           amd64        Kurento jsoncpp library
ii  kurento-media-server                   6.14.0-0kurento1.18.04                          amd64        Kurento Media Server
ii  libgstreamer-plugins-bad1.5-0:amd64    1.8.1-1kurento4.18.04                           amd64        GStreamer development files for libraries from the "bad" set
ii  libgstreamer-plugins-base1.5-0:amd64   1.8.1-1kurento2.18.04                           amd64        GStreamer libraries from the "base" set
ii  libgstreamer1.5-0:amd64                1.8.1-1kurento2.18.04                           amd64        Core GStreamer libraries and elements
ii  libnice10:amd64                        0.1.17-0kurento1.18.04                          amd64        ICE library (shared library)
ii  libsrtp0:amd64                         1.6.0-0kurento1.18.04                           amd64        Secure RTP (SRTP) and UST Reference Implementations - shared library
ii  libusrsctp                             0.9.2-1kurento1.18.04                           amd64        sctp-refimpl library
ii  openh264                               1.4.0-1kurento1.18.04                           amd64        OpenH264 library
ii  openh264-gst-plugins-bad-1.5:amd64     1.8.1-1kurento4.18.04                           amd64        GStreamer plugins from openh264
ii  openwebrtc-gst-plugins                 0.10.0-1kurento1.18.04                          amd64        OpenWebRTC specific GStreamer plugins
root@kurento-online-bj-2020061005:/var/crash/1#

[github-actions[bot]]

Hello @darrenhp! :wave: we're sorry you found a bug... so first of all, thank you very much for reporting it.

However, your report doesn't follow the issue template, so it is being automatically closed. We are really sorry for that, but we need all reports to follow the template, or else it won't be possible to understand and help with all issues.

Please, create a new issue following the template, or reopen this same issue to edit and provide all required information.

[github-actions[bot]]

Hello @darrenhp! :wave: we're sorry you found a bug... so first of all, thank you very much for reporting it.

To know about progress, check in Triage. All issues are considered Backlog Candidates until work priorities align and the issue is selected for development. It will then become part of our official Backlog.

[j1elo]

reopening because it seems valid

[j1elo]

Please see if you can get a crash report from /var/crash (read the docs about important info), or a gdb backtrace. The log by itself doesn't look like it contains enough information, now that I've had a look at it

[darrenhp]

Please see if you can get a crash report from /var/crash (read the docs about important info), or a gdb backtrace. The log by itself doesn't look like it contains enough information, now that I've had a look at it

$ ulimit -c
1024000

May be the limit is not enough, there is no core file in the _usr_bin_kurento-media-server.1000.crash