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Posted to commits@cassandra.apache.org by "Sam Tunnicliffe (Jira)" <ji...@apache.org> on 2020/05/28 12:02:00 UTC
[jira] [Comment Edited] (CASSANDRA-15812) Submitting Validation
requests can block ANTI_ENTROPY stage
[ https://issues.apache.org/jira/browse/CASSANDRA-15812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17118597#comment-17118597 ]
Sam Tunnicliffe edited comment on CASSANDRA-15812 at 5/28/20, 12:01 PM:
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bq. 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]?
was (Author: beobal):
> 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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