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Sam Tunnicliffe commented on CASSANDRA-15812:
---------------------------------------------
> Is there a scenario in which using that behavior would be better?
I can't think of one. Given that this is only targetting a major release, maybe
we don't need to preserve the original behaviour. I'll push a patch to remove
it unless anyone has reservations. [~spod], [~jjirsa]?
> Submitting Validation requests can block ANTI_ENTROPY stage
> ------------------------------------------------------------
>
> Key: CASSANDRA-15812
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15812
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Repair
> Reporter: Sam Tunnicliffe
> Assignee: Sam Tunnicliffe
> Priority: Normal
> Fix For: 4.0-alpha
>
>
> RepairMessages are handled on Stage.ANTI_ENTROPY, which has a thread pool
> with core/max capacity of one, ie. we can only process one message at a time.
>
> Scheduling validation compactions may however block the stage completely, by
> blocking on CompactionManager's ValidationExecutor while submitting a new
> validation compaction, in cases where there are already more validations
> running than can be executed in parallel.
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