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https://issues.apache.org/jira/browse/CASSANDRA-10366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14804315#comment-14804315
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Richard Low commented on CASSANDRA-10366:
-----------------------------------------
+1
> Added gossip states can shadow older unseen states
> --------------------------------------------------
>
> Key: CASSANDRA-10366
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10366
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Brandon Williams
> Assignee: Brandon Williams
> Priority: Critical
> Fix For: 2.0.17, 3.0.0 rc1, 2.1.10, 2.2.2
>
> Attachments: 10336.txt
>
>
> In CASSANDRA-6135 we added cloneWithHigherVersion to ensure that if another
> thread added states to gossip while we were notifying we would increase our
> version to ensure the existing states wouldn't get shadowed. This however,
> was not entirely perfect since it's possible that after the clone, but before
> the addition another thread will insert an even newer state, thus shadowing
> the others. A common case (of this rare one) is when STATUS and TOKENS are
> added a bit later in SS.setGossipTokens, where something in another thread
> injects a new state (likely SEVERITY) just before the addition after the
> clone.
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