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From Cyril Scetbon <cyril.scet...@free.fr>
Subject Changing nodes ips
Date Mon, 19 Oct 2015 01:58:54 GMT
Hi,

I want to change the ip addresses (ip v4) that nodes use to discuss (gossip). I'm trying to
migrate from ipv4 to ipv6 for those communications. I tried to follow a similar procedure
as the one used at CASSANDRA-8382 <https://issues.apache.org/jira/browse/CASSANDRA-8382?focusedCommentId=14259892&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14259892>.
However it doesn't work as expected. When I do the change on the first node, nodes seems to
not see each other, if I trust nodetool :

on first node :

Datacenter: s1
==============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address                     Load       Tokens  Owns    Host ID                       
       Rack
DN  10.10.12.19                ?          256     ?       dab24e23-4b42-438e-9070-7994e329e868
 i10
UN  2a01:c940:a5:2005:0:0:0:18  244.35 MB  256     ?       03c558ec-add9-4dcd-bf2b-a1b28575e06b
 c10

on second node :

Datacenter: s1
==============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address       Load       Tokens  Owns (effective)  Host ID                           
   Rack
DN  10.10.12.18  244.24 MB  256     100.0%            03c558ec-add9-4dcd-bf2b-a1b28575e06b
 c10
UN  10.10.12.19  244.11 MB  256     100.0%            dab24e23-4b42-438e-9070-7994e329e868
 i10

I can see in the first node logs that it tries to handshake with node 2, however I can't see
neither error in node 1 logs nor information in node 2 logs.

Of course, I'm trying to find a procedure that does not cause any downtime of the whole cluster.

Any idea ?  
 -- 
Cyril SCETBON


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