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https://issues.apache.org/jira/browse/CASSANDRA-16796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17383658#comment-17383658
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Caleb Rackliffe commented on CASSANDRA-16796:
---------------------------------------------
Two questions...
1.) So just to make things explicit (for me, a non-gossip expert), notifying
subscribers in {{onChange()}} means we hit {{updateNormalTokens()}}, which
removes the endpoint from the "moving endpoints" set and eventually removes the
pending ranges?
2.) What guarantees that a `PendingRangeTask` has run by the time
`gossipShutdownUpdatesTokenMetadata()` verifies there are no longer pending
range for node 2?
The 3.0 patch looks good, so moving on to 4.0...
> Clear pending ranges for a SHUTDOWN peer
> ----------------------------------------
>
> Key: CASSANDRA-16796
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16796
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Membership
> Reporter: Sam Tunnicliffe
> Assignee: Sam Tunnicliffe
> Priority: Normal
> Fix For: 3.0.x, 3.11.x, 4.0.x
>
>
> If a node involved in a MOVE operation should fail, peers can sometimes
> maintain pending ranges for it even when it has left the ring and/or been
> replaced (in practice until the peer is next bounced). This in turn can lead
> to bogus unavailable responses to clients if a replica for the any of the
> pending ranges should go down.
> If the moving node crashes hard, a subsequent replacement will correctly fail
> as long as cassandra.consistent.rangemovement is set to true because the new
> node will learn the MOVING status from the remaining peers. A graceful
> shutdown, however, causes that status to be replaced with SHUTDOWN, but
> doesn't update TokenMetadata, so pending ranges remain for the down node,
> even after it has been removed from the ring.
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