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From Jon Haddad <jonathan.had...@gmail.com>
Subject Re: C* 3 node issue -Urgent
Date Wed, 06 Sep 2017 18:40:02 GMT
I wouldn’t worry about being meticulous about keeping RF = N as the cluster grows.  If you
had 60 nodes and your auth data was only on 9 you’d be completely fine.  

> On Sep 6, 2017, at 11:36 AM, Cogumelos Maravilha <cogumelosmaravilha@sapo.pt> wrote:
> 
> After insert a new node we should:
> 
> ALTER KEYSPACE system_auth WITH REPLICATION = { 'class' : ...
> 'replication_factor' : x };
> 
> x = number of nodes in dc
> 
> The default user and password should work:
> -u cassandra -p cassandra
> 
> Cheers.
> 
> On 23-08-2017 11:14, kurt greaves wrote:
>> The cassandra user requires QUORUM consistency to be achieved for
>> authentication. Normal users only require ONE. I suspect your
>> system_auth keyspace has an RF of 1, and the node that owns the
>> cassandra users data is down.
>> 
>> Steps to recover:
>> 1. Turn off authentication on all the nodes
>> 2. Restart the nodes and make sure they are UN
>> 3. Alter system_auth to have a higher RF than 1 (3 is probably
>> appropriate)
>> 4. Turn auth back on and restart
>> 5. Create a new user and use that from now on.
>> 
>> ​
> 
> 
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