[ClusterLabs] corosync dead loop in segfault handler

[Christine Caulfield]

On 16/02/17 12:18, cys wrote:
> If you need other packages, let me know.
> 



Thanks, I can read that core now. It's something odd happening in the
sync() code that I can't quite diagnose without the blackbox. We've only
ever seen crashes like that when there's been network corruption or
on-wire incompatibilities. Has it happened before?

Chrissie

> At 2017-02-16 19:38:03, "Christine Caulfield" <ccaulfie at redhat.com> wrote:
>> On 16/02/17 09:31, cys wrote:
>>> The attachment includes coredump and logs just before corosync went wrong.
>>>
>>> The packages we use:
>>> corosync-2.3.4-7.el7_2.1.x86_64
>>> corosynclib-2.3.4-7.el7_2.1.x86_64
>>> libqb-0.17.1-2.el7.1.x86_64
>>>
>>> But they are not available any more at mirror.centos.org. If you can't find them anywhere, I can send you the RPMs.
>>> The debuginfo packages can be downloaded from http://debuginfo.centos.org/7/x86_64/.
>>>
>>
>> Can you send me the RPMs please? I tried the RHEL ones with the same
>> version number but they don't work (it was worth a try!)
>>
>> Thanks
>> Chrissie
>>
>>
>>> Unfortunately corosync was restarted yesterday, and I can't get  the blackbox dump covering the day the incident occurred.
>>>
>>> At 2017-02-16 16:00:05, "Christine Caulfield" <ccaulfie at redhat.com> wrote:
>>>> On 16/02/17 03:51, cys wrote:
>>>>> At 2017-02-15 23:13:08, "Christine Caulfield" <ccaulfie at redhat.com> wrote:
>>>>>>
>>>>>> Yes, it seems that some corosync SEGVs trigger this obscure bug in
>>>>>> libqb. I've chased a few possible causes and none have been fruitful.
>>>>>>
>>>>>> If you get this then corosync has crashed, and this other bug is masking
>>>>>> the actual diagnostics - I know, helpful :/
>>>>>>
>>>>>> It's on my list
>>>>>>
>>>>>> Chrissie
>>>>>>
>>>>>
>>>>> Thanks.
>>>>> I think you have noticed that my_service_list[3] is invalid.
>>>>> About the SEGV, do you need additional information? coredump or logs?
>>>>>
>>>>
>>>> A blackbox dump and (if possible) coredump would be very useful if you
>>>> can get them. thank you.
>>>>
>>>> Chrissie
>>