Re: [389-users] Segfault & Core Dumps

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Dael Maselli wrote:
>  Ok, I backtraced the coredump, the problem was in /usr/lib64/libssl3.so.
>
> I updated from "nss-3.12.6-1.el5_4.x86_64" to 
> "nss-3.12.7-2.el5.x86_64" and now all seems to work fine!
Thanks, good to know.
>
> Thank you.
>
> Regards,
>     Dael Maselli.
>
>
> On 08/09/10 15.16, Rich Megginson wrote:
>> Dael Maselli wrote:
>>> It worked!
>>>
>>> I wrote fs.suid_dumpable=1 in /etc/sysctl.conf, `sysctl -p` and
>>> restarted dirsrv. Now it dumps.
>>>
>>> Thank you!
>>>
>>> I will report here the backtrace when it occurs.
>> Great!  Be sure to install the 389-ds-base-debuginfo package to get the
>> symbols when generating the backtrace.
>>> Regards,
>>>      Dael Maselli.
>>>
>>>
>>>
>>> On 07/09/10 19.44, Ulf Weltman wrote:
>>>> On 9/7/2010 8:25 AM, Dael Maselli wrote:
>>>>> Hi Rich,
>>>>>
>>>>> On 07/09/10 16.56, Rich Megginson wrote:
>>>>>> Do you see seg fault messages in /var/log/messages?
>>>>> Sure: ns-slapd[13737]: segfault at 00000000000000bc rip
>>>>> 0000003abb420375
>>>>> rsp 00000000580d85d0 error 4
>>>>>
>>>>>
>>>>>> The directory server dumps core in the log file directory, which by
>>>>>> default is /var/log/dirsrv/slapd-INSTANCE
>>>>> Yes, it is the same as working directory:
>>>>> # ls -l /proc/`pidof ns-slapd`/cwd
>>>>> lrwxrwxrwx 1 root root 0 Sep 7 17:12 /proc/18721/cwd ->
>>>>> /var/log/dirsrv/slapd-ds1
>>>>>
>>>>>
>>>>>> Is the crash easily reproducible?
>>>>> No, it isn't. It seems random, but I can simulate a crash with kill
>>>>> -QUIT.
>>>>>
>>>>> I tried killing a simple `sleep 10`:
>>>>>
>>>>> # ulimit -c unlimited
>>>>>
>>>>> # sleep 10&
>>>>> [1] 19726
>>>>>
>>>>> # kill -QUIT 19726
>>>>> [1]+ Quit (core dumped) sleep 10
>>>>>
>>>>> # ls -l core.*
>>>>> -rw------- 1 root root 290816 Aug 31 08:52 core.1008
>>>>>
>>>>> But if I kill -QUIT ns-slapd no file is created.
>>>> ns-slapd typically runs as setuid to a non-root user. Check what
>>>> fs.suid_dumpable or kernel.suid_dumpable are set to.
>>>>> Thanks,
>>>>> Dael Maselli.
>>>>>
>>>>>
>>>>
>>>>
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>>>> 389-users@xxxxxxxxxxxxxxxxxxxxxxx
>>>> https://admin.fedoraproject.org/mailman/listinfo/389-users
>>> ------------------------------------------------------------------------ 
>>>
>>>
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>>> https://admin.fedoraproject.org/mailman/listinfo/389-users
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>> 389-users@xxxxxxxxxxxxxxxxxxxxxxx
>> https://admin.fedoraproject.org/mailman/listinfo/389-users
>

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