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https://issues.apache.org/jira/browse/CASSANDRA-18119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17952116#comment-17952116
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Marcus Eriksson commented on CASSANDRA-18119:
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attached details for 5.0 and trunk
> Handle sstable metadata stats file getting a new mtime after compaction has
> finished
> ------------------------------------------------------------------------------------
>
> Key: CASSANDRA-18119
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18119
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Local/Compaction, Local/Startup and Shutdown
> Reporter: Marcus Eriksson
> Assignee: Marcus Eriksson
> Priority: Normal
> Fix For: 4.0.18, 4.1.9, 5.0.5
>
> Attachments: ci_summary-4.1.html, ci_summary-trunk.html,
> ci_summary_4.0.html, ci_summary_5.0.html, result_details-trunk.tar.gz,
> result_details_5.0.tar.gz
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Due to a race between compaction finishing and compaction strategies getting
> reloaded there is a chance that we try to add both the new sstable and the
> old compacted sstable to the compaction strategy, and in the LCS case this
> can cause the old sstable to get sent to L0 to avoid overlap. This changes
> the mtime of the stats metadata file and if the node is shut down before the
> sstable is actually deleted from disk, we fail starting with the following
> exception:
> {code}
> .../mockcf1-392b3ff07c5a11ed8c662f5760cb10b3/nb_txn_compaction_3983c030-7c5a-11ed-8c66-2f5760cb10b3.log
> REMOVE:[.../data/TransactionLogsTest/mockcf1-392b3ff07c5a11ed8c662f5760cb10b3/nb-0-big-,1671096247000,5][4003386800]
> ***Unexpected files detected for sstable [nb-0-big-]: last update
> time [Thu Dec 15 10:24:09 CET 2022] (1671096249000) should have been [Thu Dec
> 15 10:24:07 CET 2022] (1671096247000)
> ADD:[.../data/TransactionLogsTest/mockcf1-392b3ff07c5a11ed8c662f5760cb10b3/nb-2-big-,0,5][319189529]
> {code}
> A workaround for this (until we properly fix the way compaction strategies
> get notified about sstable changes) is to ignore the timestamp of the STATS
> component when cleaning up compaction leftovers on startup.
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