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

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

     [ https://issues.apache.org/jira/browse/CASSANDRA-17731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Caleb Rackliffe reassigned CASSANDRA-17731:
-------------------------------------------

    Assignee: Caleb Rackliffe

> 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
>            Assignee: Caleb Rackliffe
>            Priority: Normal
>             Fix For: 4.0.x, 4.1.x, 4.x
>
>
> 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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