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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