答复: 答复: 答复: 答复: 答复: another peering stuck caused by net problem.

["yangruifeng.09209@h3c.com" <yangruifeng.09209@h3c.com>]

I will try my best to get the detailed log.
In the current version, we can ensure the messages that are related to peering is correctly received by peers?  

thanks
Ruifeng Yang.

-----邮件原件-----
发件人: Samuel Just [mailto:sjust@redhat.com] 
发送时间: 2015年11月3日 9:28
收件人: yangruifeng 09209 (RD)
抄送: chenxiaowei 11245 (RD); Sage Weil (sweil@redhat.com); ceph-devel@vger.kernel.org
主题: Re: 答复: 答复: 答复: 答复: another peering stuck caused by net problem.

Temporary network failures should be handled correctly.  The best solution is to actually fix that bug then.  Capture logging on all involved osds while it is hung and open a bug:

debug osd = 20
debug filestore = 20
debug ms = 1
-Sam

On Mon, Nov 2, 2015 at 5:24 PM, yangruifeng.09209@h3c.com <yangruifeng.09209@h3c.com> wrote:
> a unknown reason problem, which cause pg stuck in peering, may be a temporary failure network failure or other bug.
> BUT it can be solved by *manual* 'ceph osd down <osdid>'
>
> -----邮件原件-----
> 发件人: ceph-devel-owner@vger.kernel.org 
> [mailto:ceph-devel-owner@vger.kernel.org] 代表 Samuel Just
> 发送时间: 2015年11月3日 9:12
> 收件人: yangruifeng 09209 (RD)
> 抄送: chenxiaowei 11245 (RD); Sage Weil (sweil@redhat.com); 
> ceph-devel@vger.kernel.org
> 主题: Re: 答复: 答复: 答复: another peering stuck caused by net problem.
>
> The problem is that peering shouldn't hang for no reason.  If you are 
> seeing peering hang for a long time either
> 1) you are hitting a peering bug which we need to track down and fix
> 2) peering actually cannot make progress.
>
> In case 1, it can be nice to have a work around to force peering to restart and avoid the bug.  However, case 2 would not be helped by restarting peering, you'd just end up in the same place.  If you did it based on a timeout, you'd just increase load by a ton when in that situation.  What problem are you trying to solve?
> -Sam
>
> On Mon, Nov 2, 2015 at 5:05 PM, yangruifeng.09209@h3c.com <yangruifeng.09209@h3c.com> wrote:
>> ok.
>>
>> thanks
>> Ruifeng Yang
>>
>> -----邮件原件-----
>> 发件人: Samuel Just [mailto:sjust@redhat.com]
>> 发送时间: 2015年11月3日 9:03
>> 收件人: yangruifeng 09209 (RD)
>> 抄送: chenxiaowei 11245 (RD); Sage Weil (sweil@redhat.com)
>> 主题: Re: 答复: 答复: another peering stuck caused by net problem.
>>
>> Would it be ok if I reply to the list as well?
>> -Sam
>>
>> On Mon, Nov 2, 2015 at 4:37 PM, yangruifeng.09209@h3c.com <yangruifeng.09209@h3c.com> wrote:
>>> the cluster is maybe always peering in same exceptional cases, but 
>>> it can return to normal by *manual* 'ceph osd down <osdid>', this is 
>>> not convenient in a production environment, and against the concept of rados.
>>> add a timeout mechanism to kick it, or kick it when io hang, maybe reasonable?
>>>
>>> thanks,
>>> Ruifeng Yang
>>>
>>> -----邮件原件-----
>>> 发件人: Samuel Just [mailto:sjust@redhat.com]
>>> 发送时间: 2015年11月3日 2:21
>>> 收件人: yangruifeng 09209 (RD)
>>> 抄送: chenxiaowei 11245 (RD); Sage Weil (sweil@redhat.com)
>>> 主题: Re: 答复: another peering stuck caused by net problem.
>>>
>>> I mean issue 'ceph osd down <osdid>' for the primary on the pg.  But that only causes peering to restart.  If peering stalled previously, it'll probably stall again.  What are you trying to accomplish?
>>> -Sam
>>>
>>> On Fri, Oct 30, 2015 at 5:51 PM, yangruifeng.09209@h3c.com <yangruifeng.09209@h3c.com> wrote:
>>>> do you mean restart primary osd? or any other command？
>>>>
>>>> thanks
>>>> Ruifeng Yang
>>>>
>>>> -----邮件原件-----
>>>> 发件人: Samuel Just [mailto:sjust@redhat.com]
>>>> 发送时间: 2015年10月30日 23:07
>>>> 收件人: chenxiaowei 11245 (RD)
>>>> 抄送: Sage Weil (sweil@redhat.com); yangruifeng 09209 (RD)
>>>> 主题: Re: another peering stuck caused by net problem.
>>>>
>>>> How would that help?  As a way to work around a possible bug?  You can accomplish pretty much the same thing by setting the primary down.
>>>> -Sam
>>>>
>>>> On Wed, Oct 28, 2015 at 8:22 PM, Chenxiaowei <chen.xiaowei@h3c.com> wrote:
>>>>> Hi, Samuel&Sage:
>>>>>         I am cxwshawn from H3C(belong to HP), the pg peering stuck 
>>>>> problem is a serious problem especially under the production environment, So here we came up two solutions:
>>>>>         if state Peering stuck too long, we can check timeout 
>>>>> exceeds to force transition from Peering to Reset state, Or we can add a command line to force one pg from Peering stuck to Reset state.
>>>>>
>>>>> What's your advice? Wish your reply
>>>>>
>>>>> Yours
>>>>> shawn from Beijing, China.
>>>>>
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