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Posted to commits@cassandra.apache.org by "Sam Tunnicliffe (Jira)" <ji...@apache.org> on 2020/06/09 11:25:00 UTC

[jira] [Commented] (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=17129154#comment-17129154 ] 

Sam Tunnicliffe commented on CASSANDRA-15812:
---------------------------------------------

[~blerer] I've removed support for the old blocking behaviour and rebased, CI is running now

 
||Branch||JDK8||JDK11||
|[15812-trunk|https://github.com/beobal/cassandra/commits/15812-trunk]|[CircleCI|https://app.circleci.com/pipelines/github/beobal/cassandra/40/workflows/38230d47-53d3-415a-a1da-7d517b2c603b]|[CircleCI|https://app.circleci.com/pipelines/github/beobal/cassandra/40/workflows/cb744bb4-dc23-4eff-b888-96d622da3e30]|

 

> 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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