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https://issues.apache.org/jira/browse/CASSANDRA-14666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benedict updated CASSANDRA-14666:
---------------------------------
Workflow: Cassandra Bug Workflow (was: Cassandra Default Workflow)
Issue Type: Bug (was: Improvement)
> Race condition in AbstractReplicationStrategy.getNaturalReplicas
> ----------------------------------------------------------------
>
> Key: CASSANDRA-14666
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14666
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Distributed Metadata
> Reporter: Benedict
> Priority: Normal
> Labels: correctness
> Fix For: 3.0.x, 3.11.x, 4.0.x
>
>
> There is a very narrow and infrequent race window, in which two ring updates
> occur in a short space of time (or during an interval of no queries):
> - thread A invalidates the cache after the first ring change, snapshots this
> version of the ring, and begins to calculate its natural endpoints
> - thread B sees the second ring change, and invalidates the cache before
> thread A completes
> - thread A writes its value to the cache, based on the old ring layout
> Now, a stale view of the endpoints for this token will be persisted in
> AbstractReplicationStrategy until the next ring change (which may feasibly
> never occur)
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