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<p>Hello,</p>
<p>due to nature of parallel processing and using locks/mutexes, a
kill of kamailio can happen inside a locked semaphore and can
result in a deadlock while trying to sync data to backend. Rare,
but can happen, for such cases you can tune the exit_timeout
parameter value.</p>
<p>I assume you are using ims usrloc modules, because I haven't seen
this case happening lately for the standard usrloc module. The
later does a lock-free sync to database at shutdown, not sure if
the ims-usrloc module take care of doing similar approach.</p>
<p>Also, be sure you have enabled dumping of core file per
process/pid, it can be another process that is the source of
blocking at shutdown, but its core file was overwritten.<br>
</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 09.04.20 12:58, Andrey Deykunov
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAEsJsWBNiFjY6T=M0cfsf1e+JvjtRNijrA50H7iLwh9-Jm4BAw@mail.gmail.com">
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<div><span style="color:rgb(33,33,33);font-family:"Segoe
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<div><span style="color:rgb(33,33,33);font-family:"Segoe
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<div><span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">We're
getting periodically core dumps when stopping Kamailio:</span></div>
<div><span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px"><br>
</span></div>
<div><span style="color:rgb(33,33,33);font-family:"Segoe
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</span></div>
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git</span><br
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<span style="color:rgb(33,33,33);font-family:"Segoe
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help, type "help".</span><br
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<span style="color:rgb(33,33,33);font-family:"Segoe
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"apropos word" to search for commands related to "word"...</span><br
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<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">Reading
symbols from /var/lib/ums/sbin/kamailio...done.</span><br
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<span style="color:rgb(33,33,33);font-family:"Segoe
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LWP 9832]</span><br
style="color:rgb(33,33,33);font-family:"Segoe
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WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">[Thread
debugging using libthread_db enabled]</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">Using
host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">Core
was generated by `/var/lib/ums/sbin/kamailio -m 2048 -M 12 -P
/var/run/kamailio/kamailio.pid -f /'.</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">Program
terminated with signal SIGABRT, Aborted.</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#0
__GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:51</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#0
__GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:51</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#1
0x00007f79c24e842a in __GI_abort () at abort.c:89</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#2
0x000000000043f92a in sig_alarm_abort (signo=14) at main.c:679</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#3
<signal handler called></span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#4
0x00007f79c258f910 in __read_nocancel () at
../sysdeps/unix/syscall-template.S:84</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#5
0x00007f793cbd7421 in vio_read_buff () from
/var/lib/ums/lib/mysql/libmysqlclient.so.16</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#6
0x00007f793cbd8aa0 in my_real_read () from
/var/lib/ums/lib/mysql/libmysqlclient.so.16</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#7
0x00007f793cbd87d6 in my_net_read () from
/var/lib/ums/lib/mysql/libmysqlclient.so.16</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#8
0x00007f793cbd085d in cli_safe_read () from
/var/lib/ums/lib/mysql/libmysqlclient.so.16</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#9
0x00007f793cbd539a in cli_read_query_result () from
/var/lib/ums/lib/mysql/libmysqlclient.so.16</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#10
0x00007f793cbd436d in mysql_real_query () from
/var/lib/ums/lib/mysql/libmysqlclient.so.16</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#11
0x00007f793ce80c13 in db_mysql_submit_query
(_h=0x7f79c1786890, _s=0x7f793f379250 <sql_str>) at
km_dbase.c:111</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#12
0x00007f793f16baba in db_do_submit_query (_h=0x7f79c1786890,
_query=0x7f793f379250 <sql_str>,
submit_query=0x7f793ce801a0 <db_mysql_submit_query>) at
db_query.c:58</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#13
0x00007f793f16e114 in db_do_delete (_h=0x7f79c1786890,
_k=0x7ffeb3ca8df8, _o=0x0, _v=0x7ffeb3ca8dd0, _n=1,
val2str=0x7f793cea8990 <db_mysql_val2str>,
submit_query=0x7f793ce801a0 <db_mysql_submit_query>) at
db_query.c:300</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#14
0x00007f793ce86c17 in db_mysql_delete (_h=0x7f79c1786890,
_k=0x7ffeb3ca8df8, _o=0x0, _v=0x7ffeb3ca8dd0, _n=1) at
km_dbase.c:510</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#15
0x00007f793f3cb841 in db_delete_ucontact_ruid
(_c=0x7f794186b3c0) at ucontact.c:1552</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#16
0x00007f793f3cd096 in db_delete_ucontact (_c=0x7f794186b3c0)
at ucontact.c:1570</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#17
0x00007f793f3ad0c0 in wb_timer (_r=0x7f79411d7330) at
urecord.c:401</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#18
0x00007f793f3ab451 in timer_urecord (_r=0x7f79411d7330) at
urecord.c:463</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#19
0x00007f793f3978aa in mem_timer_udomain (_d=0x7f7940d9baa0,
istart=0, istep=1) at udomain.c:1224</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#20
0x00007f793f3d4608 in synchronize_all_udomains (istart=0,
istep=1) at dlist.c:756</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#21
0x00007f793f3a2768 in destroy () at usrloc_mod.c:464</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#22
0x0000000000637e2c in destroy_modules () at
core/sr_module.c:746</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#23
0x000000000041c4d8 in cleanup (show_status=1) at main.c:555</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#24
0x0000000000423af7 in shutdown_children (sig=15,
show_status=1) at main.c:696</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#25
0x000000000041f081 in handle_sigs () at main.c:727</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#26
0x0000000000432a01 in main_loop () at main.c:1806</span><br
style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">
<span style="color:rgb(33,33,33);font-family:"Segoe
UI","Segoe WP","Segoe UI
WPC",Tahoma,Arial,sans-serif;font-size:13.3333px">#27
0x000000000043df6f in main (argc=9, argv=0x7ffeb3cac348) at
main.c:2802</span> <br>
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<div>Looks like libmysql stucks at __read_nocancel() syscall.
The exit_timeout parameter is set by default (60 sec),
Kamailio version 5.3.1.</div>
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<div>Any ideas?</div>
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<div>Thanks,</div>
<div>Andrey</div>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
Kamailio (SER) - Development Mailing List
<a class="moz-txt-link-abbreviated" href="mailto:sr-dev@lists.kamailio.org">sr-dev@lists.kamailio.org</a>
<a class="moz-txt-link-freetext" href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-dev">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-dev</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a></pre>
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