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https://issues.apache.org/jira/browse/CASSANDRA-13142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16094808#comment-16094808
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Marcus Eriksson commented on CASSANDRA-13142:
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bq. I'm having trouble identifying a way to get currently running compaction
futures.
Yeah we don't keep the futures around, and it becomes quite a hack to actually
do that
maybe we should just only not cancel view/index builds and cancel regular
compactions like we do today?
> Upgradesstables cancels compactions unnecessarily
> -------------------------------------------------
>
> Key: CASSANDRA-13142
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13142
> Project: Cassandra
> Issue Type: Bug
> Reporter: Kurt Greaves
> Assignee: Kurt Greaves
> Attachments: 13142-v1.patch
>
>
> Since at least 1.2 upgradesstables will cancel any compactions bar
> validations when run. This was originally determined as a non-issue in
> CASSANDRA-3430 however can be quite annoying (especially with STCS) as a
> compaction will output the new version anyway. Furthermore, as per
> CASSANDRA-12243 it also stops things like view builds and I assume secondary
> index builds as well which is not ideal.
> We should avoid cancelling compactions unnecessarily.
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