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https://issues.apache.org/jira/browse/CASSANDRA-5459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Brown updated CASSANDRA-5459:
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Attachment: 5459-v1.patch
> Remove node from seeds list when it permanently leaves the cluster
> ------------------------------------------------------------------
>
> Key: CASSANDRA-5459
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5459
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.1.10, 1.2.4, 2.0
> Reporter: Jason Brown
> Assignee: Jason Brown
> Priority: Minor
> Labels: gossip, seeds
> Fix For: 1.1.11, 1.2.5, 2.0
>
> Attachments: 5459-v1.patch
>
>
> When a node leaves the cluster for good (via removetoken, decommission, or is
> replaced via replace_token), we clean up all references to it in MS and
> Gossiper. However, we never remove the entry from the seeds list in Gossiper
> (if the node was a seed). This will cause Gossiper to still try to
> communicate with the removed node as we try to talk to a random seed on each
> round of gossip.
> The attached patch will remove the node from seed list when it leaves the
> cluster, and further, will call the SeedProvider for an updated list of
> seeds. In a dynamic environment like EC2, when a node dies or is replaced,
> that node is never coming back. Thus is it advantageous to get a refreshed
> set of seeds to help with the network partition healing aspect of gossip (we
> dynamically retrieve that list in Priam). This makes seeds a bit more of a
> dynamic concept, but it's rather essential in a dynamic cloud environment.
> I believe this also resolves that repeated log message like :
> {code}Nodes /10.217.XXX.YYY and /10.217.AAA.BBB have the same token
> 56713727820156410577229101240436610841. Ignoring /10.217.XXX.YYY{code}
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