[Pacemaker] Behavior of booth when the fail-over in nodes and in sites is caused at the same time

[Yuichi SEINO]

Hi Jiaju,

I several times tested the failure of node by this structure.
This case is probably caused when the node having a ticket was
fail-over in two nodes.
I hope to early be resolve this problem.

Sincerely,
Yuichi

2012/6/21 Jiaju Zhang <jjzhang at suse.de>:
> On Thu, 2012-06-21 at 16:40 +0900, Yuichi SEINO wrote:
>> Hi Jiaju,
>>
>> I have a question about booth.
>> I structure 2 sites and 1 arbitrator. And each site consist of 2
>> node(ACT node and STB node).
>> Firstly, I kill corosync in one node. This node have a booth and a ticket.
>> Then booth is fail-over to STB node. The site including this node
>> always have a ticket.
>> However, an another site is granted at the same time.  Therefore, 2
>> sites was granted.
>>
>> I guess that sites cause fail-over because of a ticket was out of
>> expire date in synchronized timing.
>> However, I not see any reason to be granted 2 sites.  Are you correct
>> this behavior?
>>
>> A following information is each site of ticket information after this
>> case was caused.
>>
>> siteA:<ticket_state id="ticketA" owner="2" expires="1340255934"
>> ballot="2" granted="true" last-granted="1340255142"/>
>> siteB:<ticket_state id="ticketA" owner="2" expires="1340255933"
>> ballot="2" granted="true" last-granted="1340255441"/>
>> siteC(arbitrator):<ticket_state id="ticketA" owner="2"
>> expires="1340255934" ballot="2" granted="false"/>
>
> I think I've not quite understood what happened there. From this ticket
> information, Both siteA and siteB think ticket owner is "2", which is
> consistent, so why you say ticket was granted on two sites?
> For siteC, it has not gotten the last-granted for the time being, it
> should get this information shortly, or even for some reason siteC
> cannot get it, because the algorithm is majority-based, so it is no harm
> and allowable;)
>
> Or I have not gotten the full picture of this problem? If so, you can
> report a bug to bugzilla.novell.com, attaching the full logs there, then
> it will be good for us to investigate;)
>
> Thanks,
> Jiaju
>



-- 
Yuichi SEINO
METROSYSTEMS CORPORATION
E-mail:seino.cluster2 at gmail.com