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From "Kurt Greaves (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-14332) Fix unbounded validation compactions on repair
Date Fri, 13 Apr 2018 04:25:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-14332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16436783#comment-16436783
] 

Kurt Greaves commented on CASSANDRA-14332:
------------------------------------------

|[3.0|https://github.com/apache/cassandra/compare/cassandra-3.0...kgreav:13797-r-3.0]|[3.11|https://github.com/apache/cassandra/compare/cassandra-3.11...kgreav:13797-r-3.11]|
|[utests|https://circleci.com/gh/kgreav/cassandra/152]|[utests|https://circleci.com/gh/kgreav/cassandra/154]|

I think reverting this is the correct solution for 3.0 and 3.x. Changing defaults in minors
while in this case is probably fine, it's not good practice. Backporting CASSANDRA-13521 completely
is also a bit questionable. 

The original problem from CASSANDRA-13797 of the interrupted exceptions is only very minor,
and likely not possible outside of CCM clusters.

> Fix unbounded validation compactions on repair
> ----------------------------------------------
>
>                 Key: CASSANDRA-14332
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14332
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Kurt Greaves
>            Priority: Major
>
> After CASSANDRA-13797 it's possible to cause unbounded, simultaneous validation compactions
as we no longer wait for validations to finish. Potential fix is to have a sane default for
the # of concurrent validation compactions by backporting CASSANDRA-13521 and setting a sane
default.



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