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https://issues.apache.org/jira/browse/CASSANDRA-12212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15391432#comment-15391432
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Stefania commented on CASSANDRA-12212:
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I'm pretty sure that in 2.1 we no longer store deltas for counters in memtables
or sstables, and so we should be able to tolerate an old and a compacted
sstable but, just to be sure, can you confirm [~iamaleksey]?
bq. But if that is no longer the case why do we still track them there?
I think it'ss just to clean-up compaction left overs regardless of counters.
> system.compactions_in_progress needs to be used on first upgrade to 3.0
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-12212
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12212
> Project: Cassandra
> Issue Type: Bug
> Components: Compaction
> Reporter: Jeremiah Jordan
> Assignee: Stefania
> Fix For: 3.0.x, 3.x
>
>
> CASSANDRA-7066 removed the system.compactions_in_progress table and replaced
> it with the new transaction system. But system.compactions_in_progress needs
> to be consulted for the first startup after upgrading from 2.1 to 3.0.
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