while replacing a node in a cluster I saw this log:
2019-08-27 16:35:31,439 Gossiper.java:995 - InetAddress /10.15.53.27
is now DOWN
it caught my attention because that ip address doesn't exist anymore in the cluster and it hasn't for a long time.
After some reading I ran `nodetool gossipinfo` and I saw these entries which are nodes that don't exist anymore:
the generations are:
- Wed, 23 Aug 2017 09:30:18 GMT
- Fri, 25 Aug 2017 04:52:59 GMT
I don't remember what we did at that time but it looks like we botched something while joining a node or something.
* nodetool removenode 10.15.53.27
* if it doesn't work for some reason: nodetool assassinate 10.15.53.27
Since those nodes have been long dead and don't appear in system.peer I don't anticipate any problems but I'd like some confirmation that this can't break my cluster.