[ClusterLabs] Antw: Re: When the DC crmd is frozen, cluster decisions are delayed infinitely

Digimer lists at alteeve.ca
Thu Sep 8 02:55:50 EDT 2016

On 08/09/16 03:47 PM, Ulrich Windl wrote:
>>>> Shermal Fernando <shermalfe at millenniumit.com> schrieb am 08.09.2016 um 06:41 in
> Nachricht
> <8CE6E8D87F896546B9C65ED80D30A4336578CB4A at LG-SPMB-MBX02.lseg.stockex.local>:
>> The whole cluster will fail if the DC (crm daemon) is frozen due to CPU 
>> starvation or hanging while trying to perform a IO operation.  
>> Please share some thoughts on this issue.
> What is "the whole cluster will fail"? If the DC times out, some recovery will take place.

Yup. The starved node should be declared lost by corosync, the remaining
nodes reform and if they're still quorate, the hung node should be
fenced. Recovery occur and life goes on.

Unless you don't have fencing, then may $deity of mercy. ;)

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