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https://issues.apache.org/jira/browse/CASSANDRA-10847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15098177#comment-15098177
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Sylvain Lebresne commented on CASSANDRA-10847:
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Am I wrong in assuming that {{nonEmptyTasks}} cannot be greater than 2 (one 
task for repaired sstables, one for unrepaired ones)? If I'm not, I feel a 
message like
{noformat}
Cannot perform a full major compaction as repaired and unrepaired sstables 
cannot be compacted together. These two set of sstables will be compacted 
separately.
{noformat}
might be more clear to users?

> Log a message when refusing a major compaction due to incremental repairedAt 
> status
> -----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10847
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10847
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: Brandon Williams
>            Assignee: Marcus Eriksson
>            Priority: Trivial
>             Fix For: 2.1.x, 2.2.x, 3.0.x, 3.x
>
>
> When you do a major compaction, but have some repaired sstables and some that 
> are not, it will correctly not compact them together.  However, it can be 
> somewhat confusing the operator as to *why* they aren't compacting together.  
> It would be beneficial, specifically when doing a major, to log that we 
> aren't going to do a full major because of this.



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