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From Jonathan Ellis <>
Subject Re: change node IP address
Date Thu, 24 Mar 2011 05:04:07 GMT
We support changing IPs to _new_ IPs but I'd be surprised if it can
handle changing it to the IP of another node.  I'd try using a 3rd
"temporary" IP if I wanted to swap two.

On Wed, Mar 23, 2011 at 6:18 PM, aaron morton <> wrote:
> Can any of the dev's jump in here ? Whats best practice ?
> Aaron
> On 24 Mar 2011, at 08:32, Casey Deccio wrote:
> Hi Aaron,
> I'm using 7.3 (upgrading to 7.4).  Basically I needed to swap the IPs of two
> of my nodes.  Unfortunately, after I did so, neither was accessible in the
> original ring anymore.  I saw the warning message in the logs about the
> token being reassigned.  Maybe I didn't give it enough time, but
> accessibility faltered, so I reverted the IPs of the nodes, decommissioned
> them each, swapped their IPs again, then brought them back into the ring one
> at a time.  That seemed to work.  I admit that I'm still quite a novice when
> it comes to cassandra's workings, and since my system was unresponsive for a
> time, my goal was bringing it back up, and I didn't dive into extensive
> analysis.
> Casey
> On Wed, Mar 23, 2011 at 2:16 AM, aaron morton <>
> wrote:
>> Which version are you using ?
>> It looks like using 0.7X (and prob 0.6) versions you can just shutdown the
>> node and bring it back up with the new IP and It Just
>> Works
>> I've not done it before, anyone else ?
>> Aaron
>> On 23 Mar 2011, at 07:53, Casey Deccio wrote:
>> What is the process of changing the IP address for a node in a cluster?
>> Casey

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support

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