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https://issues.apache.org/jira/browse/CASSANDRA-13123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16189523#comment-16189523
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Joshua McKenzie commented on CASSANDRA-13123:
---------------------------------------------
bq. suspect it may be a test ordering issue (if the two tests are run in one
order they pass, in the other they fail, so probably setup/teardown conditions).
The brittleness of CL startup/teardown in unit testing was a pretty significant
pain in the ass when I was working on CDC. Stupp and I have both bumped up
against that in the memorable recent past and tidied things up a bit, but I
suspect it will require a more invasive re-arch of the segment allocation and
CL startup/shutdown to get it really ironed out.
> Draining a node might fail to delete all inactive commitlogs
> ------------------------------------------------------------
>
> Key: CASSANDRA-13123
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13123
> Project: Cassandra
> Issue Type: Bug
> Components: Local Write-Read Paths
> Reporter: Jan Urbański
> Assignee: Jan Urbański
> Fix For: 3.0.15, 3.11.1, 4.0
>
> Attachments: 13123-2.2.8.txt, 13123-3.0.10.txt, 13123-3.9.txt,
> 13123-trunk.txt
>
>
> After issuing a drain command, it's possible that not all of the inactive
> commitlogs are removed.
> The drain command shuts down the CommitLog instance, which in turn shuts down
> the CommitLogSegmentManager. This has the effect of discarding any pending
> management tasks it might have, like the removal of inactive commitlogs.
> This in turn leads to an excessive amount of commitlogs being left behind
> after a drain and a lengthy recovery after a restart. With a fleet of dozens
> of nodes, each of them leaving several GB of commitlogs after a drain and
> taking up to two minutes to recover them on restart, the additional time
> required to restart the entire fleet becomes noticeable.
> This problem is not present in 3.x or trunk because of the CLSM rewrite done
> in CASSANDRA-8844.
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