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Posted to users@httpd.apache.org by Mangesh Sawant <m....@gmail.com> on 2013/05/16 12:55:07 UTC
[users@httpd] Crash in mod_ldap.so only during stress.
Hi,
stressing mod_ldap.so for 500 users with 100 TPS.
Only during stress I can see crash.
Following is the stack stress.
#0 0x02a9db03 in ldap_int_open_connection () from
/home/alepo/rbsisp/libldap-2.3.so.0
#1 0x02ab17e6 in ldap_new_connection () from
/home/alepo/rbsisp/libldap-2.3.so.0
#2 0x02a9dab1 in ldap_open_defconn () from
/home/alepo/rbsisp/libldap-2.3.so.0
#3 0x02ab21f8 in ldap_send_initial_request () from
/home/alepo/rbsisp/libldap-2.3.so.0
#4 0x02aa7318 in ldap_sasl_bind () from /home/alepo/rbsisp/libldap-2.3.so.0
#5 0x02aa75ea in ldap_sasl_bind_s () from
/home/alepo/rbsisp/libldap-2.3.so.0
#6 0x02aa77ad in ldap_simple_bind_s () from
/home/alepo/rbsisp/libldap-2.3.so.0
#7 0xf67b079e in uldap_connection_open (r=0xe2105a10, ldc=0x9dd6830)
#8 0xf67b19c0 in uldap_cache_checkuserid (r=0xe2105a10, ldc=0x9dd6830,
Crash happens after 10 users are processed.
--
Thanks And Regards ,
Mangesh Sawant .
Re: [users@httpd] Crash in mod_ldap.so only during stress.
Posted by Mangesh Sawant <m....@gmail.com>.
Thanks for quick reply.
Getting crash at different places during each new stress run.
Following is gdb trace showing crash starting from ldap_search_ext_s().
Actual crash taking place in libldap-2.3.so.0.
#0 0xf779f430 in __kernel_vsyscall ()
#1 0x007d2d11 in raise () from /lib/libc.so.6
#2 0x007d45ea in abort () from /lib/libc.so.6
#3 0x00810b9d in __libc_message () from /lib/libc.so.6
#4 0x0089ffed in __fortify_fail () from /lib/libc.so.6
#5 0x0089e01a in __chk_fail () from /lib/libc.so.6
#6 0x004ce2d7 in ber_get_next () from /home/alepo/rbsisp/liblber-2.3.so.0
#7 0x02a9eb22 in ?? () from /home/alepo/rbsisp/libldap-2.3.so.0
#8 0x02aa0065 in ldap_result () from /home/alepo/rbsisp/libldap-2.3.so.0
#9 0x02aa1aa2 in ldap_search_ext_s () from
/home/alepo/rbsisp/libldap-2.3.so.0
#10 0xf67e6acc in uldap_cache_checkuserid (r=0xe26195c8, ldc=0x98cefb0,
On Thu, May 16, 2013 at 5:53 PM, Eric Covener <co...@gmail.com> wrote:
> On Thu, May 16, 2013 at 8:18 AM, Mangesh Sawant <m....@gmail.com>
> wrote:
> > Yes, there are 20 threads sending auth request.
>
> I mean in the server. The one you posted doesn't look like it crashed.
> >
> >
> > On Thu, May 16, 2013 at 5:37 PM, Eric Covener <co...@gmail.com> wrote:
> >>
> >> Is this prefork, or are there other threads?
> >>
> >> On Thu, May 16, 2013 at 6:55 AM, Mangesh Sawant <m....@gmail.com>
> >> wrote:
> >> > Hi,
> >> >
> >> > stressing mod_ldap.so for 500 users with 100 TPS.
> >> > Only during stress I can see crash.
> >> > Following is the stack stress.
> >> >
> >> > #0 0x02a9db03 in ldap_int_open_connection () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #1 0x02ab17e6 in ldap_new_connection () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #2 0x02a9dab1 in ldap_open_defconn () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #3 0x02ab21f8 in ldap_send_initial_request () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #4 0x02aa7318 in ldap_sasl_bind () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #5 0x02aa75ea in ldap_sasl_bind_s () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #6 0x02aa77ad in ldap_simple_bind_s () from
> >> > /home/alepo/rbsisp/libldap-2.3.so.0
> >> > #7 0xf67b079e in uldap_connection_open (r=0xe2105a10, ldc=0x9dd6830)
> >> > #8 0xf67b19c0 in uldap_cache_checkuserid (r=0xe2105a10,
> ldc=0x9dd6830,
> >> >
> >> > Crash happens after 10 users are processed.
> >> >
> >> > --
> >> > Thanks And Regards ,
> >> > Mangesh Sawant .
> >>
> >>
> >>
> >> --
> >> Eric Covener
> >> covener@gmail.com
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> >> For additional commands, e-mail: users-help@httpd.apache.org
> >>
> >
> >
> >
> > --
> > Thanks And Regards ,
> > Mangesh Sawant .
>
>
>
> --
> Eric Covener
> covener@gmail.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
--
Thanks And Regards ,
Mangesh Sawant .
Re: [users@httpd] Crash in mod_ldap.so only during stress.
Posted by Eric Covener <co...@gmail.com>.
On Thu, May 16, 2013 at 8:18 AM, Mangesh Sawant <m....@gmail.com> wrote:
> Yes, there are 20 threads sending auth request.
I mean in the server. The one you posted doesn't look like it crashed.
>
>
> On Thu, May 16, 2013 at 5:37 PM, Eric Covener <co...@gmail.com> wrote:
>>
>> Is this prefork, or are there other threads?
>>
>> On Thu, May 16, 2013 at 6:55 AM, Mangesh Sawant <m....@gmail.com>
>> wrote:
>> > Hi,
>> >
>> > stressing mod_ldap.so for 500 users with 100 TPS.
>> > Only during stress I can see crash.
>> > Following is the stack stress.
>> >
>> > #0 0x02a9db03 in ldap_int_open_connection () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #1 0x02ab17e6 in ldap_new_connection () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #2 0x02a9dab1 in ldap_open_defconn () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #3 0x02ab21f8 in ldap_send_initial_request () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #4 0x02aa7318 in ldap_sasl_bind () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #5 0x02aa75ea in ldap_sasl_bind_s () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #6 0x02aa77ad in ldap_simple_bind_s () from
>> > /home/alepo/rbsisp/libldap-2.3.so.0
>> > #7 0xf67b079e in uldap_connection_open (r=0xe2105a10, ldc=0x9dd6830)
>> > #8 0xf67b19c0 in uldap_cache_checkuserid (r=0xe2105a10, ldc=0x9dd6830,
>> >
>> > Crash happens after 10 users are processed.
>> >
>> > --
>> > Thanks And Regards ,
>> > Mangesh Sawant .
>>
>>
>>
>> --
>> Eric Covener
>> covener@gmail.com
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>> For additional commands, e-mail: users-help@httpd.apache.org
>>
>
>
>
> --
> Thanks And Regards ,
> Mangesh Sawant .
--
Eric Covener
covener@gmail.com
---------------------------------------------------------------------
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Re: [users@httpd] Crash in mod_ldap.so only during stress.
Posted by Mangesh Sawant <m....@gmail.com>.
Yes, there are 20 threads sending auth request.
On Thu, May 16, 2013 at 5:37 PM, Eric Covener <co...@gmail.com> wrote:
> Is this prefork, or are there other threads?
>
> On Thu, May 16, 2013 at 6:55 AM, Mangesh Sawant <m....@gmail.com>
> wrote:
> > Hi,
> >
> > stressing mod_ldap.so for 500 users with 100 TPS.
> > Only during stress I can see crash.
> > Following is the stack stress.
> >
> > #0 0x02a9db03 in ldap_int_open_connection () from
> > /home/alepo/rbsisp/libldap-2.3.so.0
> > #1 0x02ab17e6 in ldap_new_connection () from
> > /home/alepo/rbsisp/libldap-2.3.so.0
> > #2 0x02a9dab1 in ldap_open_defconn () from
> > /home/alepo/rbsisp/libldap-2.3.so.0
> > #3 0x02ab21f8 in ldap_send_initial_request () from
> > /home/alepo/rbsisp/libldap-2.3.so.0
> > #4 0x02aa7318 in ldap_sasl_bind () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> > #5 0x02aa75ea in ldap_sasl_bind_s () from
> > /home/alepo/rbsisp/libldap-2.3.so.0
> > #6 0x02aa77ad in ldap_simple_bind_s () from
> > /home/alepo/rbsisp/libldap-2.3.so.0
> > #7 0xf67b079e in uldap_connection_open (r=0xe2105a10, ldc=0x9dd6830)
> > #8 0xf67b19c0 in uldap_cache_checkuserid (r=0xe2105a10, ldc=0x9dd6830,
> >
> > Crash happens after 10 users are processed.
> >
> > --
> > Thanks And Regards ,
> > Mangesh Sawant .
>
>
>
> --
> Eric Covener
> covener@gmail.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
--
Thanks And Regards ,
Mangesh Sawant .
Re: [users@httpd] Crash in mod_ldap.so only during stress.
Posted by Eric Covener <co...@gmail.com>.
Is this prefork, or are there other threads?
On Thu, May 16, 2013 at 6:55 AM, Mangesh Sawant <m....@gmail.com> wrote:
> Hi,
>
> stressing mod_ldap.so for 500 users with 100 TPS.
> Only during stress I can see crash.
> Following is the stack stress.
>
> #0 0x02a9db03 in ldap_int_open_connection () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> #1 0x02ab17e6 in ldap_new_connection () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> #2 0x02a9dab1 in ldap_open_defconn () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> #3 0x02ab21f8 in ldap_send_initial_request () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> #4 0x02aa7318 in ldap_sasl_bind () from /home/alepo/rbsisp/libldap-2.3.so.0
> #5 0x02aa75ea in ldap_sasl_bind_s () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> #6 0x02aa77ad in ldap_simple_bind_s () from
> /home/alepo/rbsisp/libldap-2.3.so.0
> #7 0xf67b079e in uldap_connection_open (r=0xe2105a10, ldc=0x9dd6830)
> #8 0xf67b19c0 in uldap_cache_checkuserid (r=0xe2105a10, ldc=0x9dd6830,
>
> Crash happens after 10 users are processed.
>
> --
> Thanks And Regards ,
> Mangesh Sawant .
--
Eric Covener
covener@gmail.com
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