Regression between 10 & 11, Freeswitch hangs when exiting

[Eugene Grosbein]

11.02.2018 2:29, Eric Masson пишет:
> Hi,
> 
> Freeswitch, a multiprotocol softswitch (http://freewitch.org) runs on
> FreeBSD and a port is available (net/freeswitch/)
> 
> Freeswitch runs fine on any 10.x installation, issueing the shutdown
> command from cli makes the application exit cleanly.
> 
> On any 11.x installation, issueing the shutdown command from cli makes
> the application hang.
> 
> FreeBSD version is :
> FreeBSD newsrv.interne.associated-bears.org 11.1-STABLE FreeBSD 11.1-STABLE #0 r327876M: Sat Jan 13 16:19:26 CET 2018     emss at newsrv.interne.associated-bears.org:/usr/obj/usr/src/sys/SE7525GP2  amd64
> 
> Generic or custom kernel behave the same.
> 
> On Freeswitch side, 1.6.19 (net/freeswitch) and also git branches master
> & v1.6 show the same issue.
> 
> I've reproduced the issue on the latest v1.6, the backtrace of stuck
> process shows the following :
> #0  0x00000008030ea91c in _umtx_op_err () from /lib/libthr.so.3
> #1  0x00000008030e6f97 in join_common (pthread=0x807ed7700, thread_return=0x7fffffffb658, abstime=0x0) at /usr/src/lib/libthr/thread/thr_join.c:125
> #2  0x0000000800f01421 in apr_thread_join (retval=0x7fffffffb68c, thd=0x8059e9658) at threadproc/unix/thread.c:234
> #3  0x0000000800cd889e in do_shutdown (module=0x2, shutdown=<optimized out>, unload=SWITCH_TRUE, fail_if_busy=(unknown: 1523667750), err=<optimized out>) at src/switch_loadable_module.c:2031
> #4  0x0000000800cdb84a in switch_loadable_module_shutdown () at src/switch_loadable_module.c:2083
> #5  0x0000000800c9d92c in switch_core_destroy () at src/switch_core.c:2940
> #6  0x0000000000403b2b in main (argc=<optimized out>, argv=0x7fffffffe988) at src/switch.c:1210
> 
> It seems the issue lies in thread handling.
> 
> I've attached :
> - the output of a Freeswitch related script used to gather relevant
>   information.
> - source files showing in bt
> 
> Thank for help.

See also: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225584
What CPU do you use?