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https://issues.apache.org/jira/browse/CASSANDRA-11657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15280149#comment-15280149
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Marcus Eriksson commented on CASSANDRA-11657:
---------------------------------------------

Tried to reproduce this today by running {{testParallelLeveledCompaction}} in a 
loop, never failed, then I realized that the new {{testLeveledScanner}} breaks 
the leveled manifest and we can't get compaction tasks after that (the sstable 
is in the wrong level and we can't remove it from the manifest then: 
https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/compaction/LeveledManifest.java#L489).
 This gets getNextBackgroundTask stuck in a loop since we try marking a 
non-existing sstable as compacting.

I have no idea why this test failed before CASSANDRA-9935 but I cant reproduce 
that anymore.

Patch to run on separate tables here: 
https://github.com/krummas/cassandra/commits/marcuse/11657-2

> LongLeveledCompactionStrategyTest broken since CASSANDRA-10099
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-11657
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11657
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>             Fix For: 3.x
>
>
> Seems CASSANDRA-10099 broke LongLeveledCompactionStrategyTest



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