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Re: (ITS#7450) segfault with listener-threads=8
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Hi, Michael,
This is my simplified configuration file which can reproduce the segfault.
For the purpose of replay, I use "50" instead of "8" because using "8"
sometime cannot reproduce the error.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
slapd.conf
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
listener-threads 50
include /xxx/etc/openldap/schema/core.schema
pidfile /xxx/var/run/slapd.pid
argsfile /xxx/var/run/slapd.args
database bdb
suffix "dc=3Dxxx,dc=3Dxxx"
rootdn "cn=3Dxxx,dc=3Dxxx,dc=3Dxxx"
rootpw secret
directory /xxx/var/openldap-data
index objectClass eq
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The stack traces are:
Thread 3 (Thread 0x7ffff4f2c700 (LWP 24897)):
#0 0x00007ffff6d40481 in clone () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff7012dc0 in ?? () from /lib/x86_64-linux-gnu/libpthread.so.0
#2 0x00007ffff4f2c700 in ?? ()
#3 0x0000000000000000 in ?? ()
Thread 2 (Thread 0x7ffff572d700 (LWP 24896)):
#0 0x000000000042543f in slapd_add (s=3D10, isactive=3D0, sl=3D0x0, id=3D0=
) at
daemon.c:857
#1 0x0000000000429afc in slapd_daemon_task (ptr=3D0xaa8ed0) at daemon.c:21=
37
#2 0x00007ffff7012e9a in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#3 0x00007ffff6d404bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4 0x0000000000000000 in ?? ()
Thread 1 (Thread 0x7ffff7fe1700 (LWP 24893)):
#0 0x00007ffff6d40481 in clone () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff7011f70 in do_clone.constprop.4 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2 0x00007ffff70138ba in pthread_create@@GLIBC_2.2.5 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#3 0x000000000058ccbb in ldap_pvt_thread_create (thread=3D0xaa8ed8,
detach=3D0, start_routine=3D0x429a7c <slapd_daemon_task>, arg=3D0xaa8ed8\
) at thr_posix.c:165
#4 0x000000000042bf28 in slapd_daemon () at daemon.c:2918
#5 0x00000000004087b8 in main (argc=3D7, argv=3D0x7fffffffe008) at main.c:=
1012
The GDB stopped at the following statement:
assert( SLAP_SOCK_NOT_ACTIVE(id, s) );
which is in slapd_add, daemon.c:857.
Best regards,
Jackie
On Sun, Nov 25, 2012 at 6:29 AM, Michael Str=F6der <michael@stroeder.com>wr=
ote:
> jackie.qq.zhang@gmail.com wrote:
> > The default configuration does not have this problem. So I checked ever=
y
> > configuration setting I made and finally found it's caused by the
> following
> > setting:
> >
> > listener-threads 8
>
> I tried to reproduce this by adding the line above to my local config. Bu=
t
> slapd still works on my system.
>
> Could you please provide a canned config which reproduces the seg fault a=
nd
> preferrably a full stack trace?
>
> http://www.openldap.org/faq/data/cache/59.html
>
> Make sure you have installed slapd with debug symbols (make install
> STRIP=3D"").
>
> Ciao, Michael.
>
--20cf300faffd868e6d04cf5a0c62
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Hi, Michael,<br><br>This is my simplified configuration file which can repr=
oduce the segfault. For the purpose of replay, I use "50" instead=
of "8" because using "8" sometime cannot reproduce the=
error.<br>
<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
slapd.conf<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
listener-threads 50<br>include=A0=A0=A0=A0=A0=A0 /xxx/etc/openldap/schema/c=
ore.schema<br>
pidfile=A0=A0=A0=A0=A0=A0=A0=A0 /xxx/var/run/slapd.pid<br>
argsfile=A0=A0=A0=A0=A0=A0 /xxx/var/run/slapd.args<br>
<br>
database=A0=A0=A0=A0=A0=A0=A0 bdb <br>
suffix=A0=A0=A0=A0=A0=A0=A0=A0=A0 "dc=3Dxxx,dc=3Dxxx"<br>
rootdn=A0=A0=A0=A0=A0=A0=A0=A0=A0 "cn=3Dxxx,dc=3Dxxx,dc=3Dxxx"<br=
>
rootpw=A0=A0=A0=A0=A0=A0=A0=A0=A0 secret<br>
directory=A0=A0=A0=A0=A0=A0 /xxx/var/openldap-data<br>
index=A0=A0 objectClass=A0=A0=A0=A0 eq<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br><br><br>The stack traces are:=
<br><br>Thread 3 (Thread 0x7ffff4f2c700 (LWP 24897)):<br>#0=A0 0x00007ffff6=
d40481 in clone () from /lib/x86_64-linux-gnu/libc.so.6<br>#1=A0 0x00007fff=
f7012dc0 in ?? () from /lib/x86_64-linux-gnu/libpthread.so.0<br>
#2=A0 0x00007ffff4f2c700 in ?? ()<br>#3=A0 0x0000000000000000 in ?? ()<br><=
br>Thread 2 (Thread 0x7ffff572d700 (LWP 24896)):<br>#0=A0 0x000000000042543=
f in slapd_add (s=3D10, isactive=3D0, sl=3D0x0, id=3D0) at daemon.c:857<br>=
#1=A0 0x0000000000429afc in slapd_daemon_task (ptr=3D0xaa8ed0) at daemon.c:=
2137<br>
#2=A0 0x00007ffff7012e9a in start_thread () from /lib/x86_64-linux-gnu/libp=
thread.so.0<br>#3=A0 0x00007ffff6d404bd in clone () from /lib/x86_64-linux-=
gnu/libc.so.6<br>#4=A0 0x0000000000000000 in ?? ()<br><br>Thread 1 (Thread =
0x7ffff7fe1700 (LWP 24893)):<br>
#0=A0 0x00007ffff6d40481 in clone () from /lib/x86_64-linux-gnu/libc.so.6<b=
r>#1=A0 0x00007ffff7011f70 in do_clone.constprop.4 () from /lib/x86_64-linu=
x-gnu/libpthread.so.0<br>#2=A0 0x00007ffff70138ba in pthread_create@@GLIBC_=
2.2.5 () from /lib/x86_64-linux-gnu/libpthread.so.0<br>
#3=A0 0x000000000058ccbb in ldap_pvt_thread_create (thread=3D0xaa8ed8, deta=
ch=3D0, start_routine=3D0x429a7c <slapd_daemon_task>, arg=3D0xaa8ed8\=
<br>) at thr_posix.c:165<br>#4=A0 0x000000000042bf28 in slapd_daemon () at =
daemon.c:2918<br>
#5=A0 0x00000000004087b8 in main (argc=3D7, argv=3D0x7fffffffe008) at main.=
c:1012<br><br>The GDB stopped at the following statement: <br><br>assert( S=
LAP_SOCK_NOT_ACTIVE(id, s) );<br><br>which is in slapd_add, daemon.c:857.<b=
r>
<br>Best regards,<br>Jackie<br><br><br><br><div class=3D"gmail_quote">On Su=
n, Nov 25, 2012 at 6:29 AM, Michael Str=F6der <span dir=3D"ltr"><<a href=
=3D"mailto:michael@stroeder.com"; target=3D"_blank">michael@stroeder.com</a>=
></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><a href=3D"mailto:jackie.qq.zhang@gmail.com"=
>jackie.qq.zhang@gmail.com</a> wrote:<br>
> The default configuration does not have this problem. So I checked eve=
ry<br>
> configuration setting I made and finally found it's caused by the =
following<br>
> setting:<br>
><br>
> listener-threads 8<br>
<br>
I tried to reproduce this by adding the line above to my local config. But<=
br>
slapd still works on my system.<br>
<br>
Could you please provide a canned config which reproduces the seg fault and=
<br>
preferrably a full stack trace?<br>
<br>
<a href=3D"http://www.openldap.org/faq/data/cache/59.html"; target=3D"_blank=
">http://www.openldap.org/faq/data/cache/59.html</a><br>
<br>
Make sure you have installed slapd with debug symbols (make install STRIP=
=3D"").<br>
<br>
Ciao, Michael.<br>
</blockquote></div><br>
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