[jira] [Commented] (CASSANDRA-14079) Prevent compaction strategies from looping indefinitely

["Paulo Motta (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-14079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16272515#comment-16272515 ] 

Paulo Motta commented on CASSANDRA-14079:
-----------------------------------------

Adding patch that adds a test to reproduce issue and breaks out of {{getNextBackgroundTask}} loop if the previous candidate is equal to the current.

3.11 patch: [branch|https://github.com/pauloricardomg/cassandra/tree/3.11-14079]

CI looks good.

> Prevent compaction strategies from looping indefinitely
> -------------------------------------------------------
>
>                 Key: CASSANDRA-14079
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14079
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Paulo Motta
>            Assignee: Paulo Motta
>            Priority: Minor
>
> As a result of CASSANDRA-13948, LCS was looping indefinitely trying to generate the same candidates for SSTables which were not on the tracker.
> We should add a protection on compaction strategies against looping indefinitely to avoid similar bugs in the future.



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