Benedict created CASSANDRA-14666:
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Summary: Race condition in
AbstractReplicationStrategy.getNaturalReplicas
Key: CASSANDRA-14666
URL: https://issues.apache.org/jira/browse/CASSANDRA-14666
Project: Cassandra
Issue Type: Improvement
Reporter: Benedict
Assignee: Benedict
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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