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Posted to commits@cassandra.apache.org by "Sam Tunnicliffe (Jira)" <ji...@apache.org> on 2020/05/13 19:04:00 UTC

[jira] [Created] (CASSANDRA-15812) Submitting Validation requests can block ANTI_ENTROPY stage

Sam Tunnicliffe created CASSANDRA-15812:
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             Summary: 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
            Reporter: Sam Tunnicliffe
            Assignee: Sam Tunnicliffe


 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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