[jira] [Created] (CASSANDRA-17731) Clean up ScheduledExecutors shutdown for in-JVM dtests

["Caleb Rackliffe (Jira)" <ji...@apache.org>]

Caleb Rackliffe created CASSANDRA-17731:
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             Summary: Clean up ScheduledExecutors shutdown for in-JVM dtests
                 Key: CASSANDRA-17731
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17731
             Project: Cassandra
          Issue Type: Bug
          Components: Test/dtest/java
            Reporter: Caleb Rackliffe


There appear to be two problems w/ the way we shut down {{ScheduledExecutors}} in Instance in 4.0+:

1.) We do it twice, Ince as part of a larger batch of shutdown activity, and then again in its own {{parallelRun()}} block.
2.) It happens before {{MessagingService}} shuts down, but some messaging-related threads (see {{StreamSession#closeSession()}}) can submit tasks to {{nonPeriodicTasks}}.

We should do it once, and do it after the {{MessagingService}} has properly shut down.



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