R: [Linux-cluster] "Missed too many heartbeats" messages and hung cluster

[Fabrizio Lippolis]

Leandro Dardini ha scritto:

> If something happens between the two machine, they fence each other.

I have configured manual fencing but as I wrote it's not much useful 
since, I think, requires manual handling which couldn't be possible 
immediately. Therefore I am looking for a method to let the services run 
even if such a thing happens. This is not the first time the problem 
arises, apparently without a reason, though the last time happened long 
time ago.

> You can try to "ping" each other and see, when the problem arise, the connectivity state.

Sometimes the machines are completely locked and it's not even possible 
to log in. A brute force switch off is necessary in this case. Sometimes 
looks like only the cluster service is locked and I can regularly ping 
the other machine though the cluster is not working.

> Maybe a "too much intelligent switch" is handling the traffic and have some sort of "traffic shaping and control".

There is nothing like that, the two machines are connected by a 1GB 
crossover cable, not even so long, provided by HP with the two machines.

-- 
Fabrizio Lippolis                fabrizio.lippolis at aurigainformatica.it
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