[jira] [Commented] (CASSANDRA-17168) Don't block gossip when clearing snapshots for failing repairs

["Marcus Eriksson (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-17168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17472105#comment-17472105 ] 

Marcus Eriksson commented on CASSANDRA-17168:
---------------------------------------------

updated the trunk patch to not change the protocol, feels unnecessary to break compatibility for something this small 

> Don't block gossip when clearing snapshots for failing repairs
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-17168
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17168
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Repair
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>            Priority: Normal
>             Fix For: 4.0.x, 4.x
>
>
> We clear snapshots in the GossipTasks thread when a repair session fails due to a replica shutting down. If there are many tables/repair sessions ongoing this can take a long time. With enough tables being repaired at the same time even checking if the snapshots exists can take long enough to mark nodes down.
> We should clear snapshots in a separate thread and add a flag to tell us whether this repair session can have snapshots to avoid checking if the directory exists.



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