[jira] [Updated] (CASSANDRA-21035) Nodes with LEFT state do not get expired from gossip

["Sam Tunnicliffe (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-21035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Tunnicliffe updated CASSANDRA-21035:
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    Attachment: ci_summary.html
                result_details.tar.gz

> Nodes with LEFT state do not get expired from gossip
> ----------------------------------------------------
>
>                 Key: CASSANDRA-21035
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21035
>             Project: Apache Cassandra
>          Issue Type: Bug
>          Components: Cluster/Gossip
>            Reporter: Sam Tunnicliffe
>            Assignee: Sam Tunnicliffe
>            Priority: Normal
>             Fix For: 6.x
>
>         Attachments: ci_summary.html, result_details.tar.gz
>
>
> When a node is removed from the cluster via decommission/removenode/assassinate it is transitioned to a LEFT status in gossip. For historical reasons, this state is intended to persist in gossip for some period (default is 72hrs) before being expunged. Since CEP-21, gossip status is no longer used for anything significant by C* itself, but this behaviour was preserved in case any tooling was relying on it. However, there is a bug in that the purging from gossip after 72 hrs is not occurring correctly.  From the perspective of C* itself this is harmless, but it will eventually lead to gossip state being oversized.



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