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https://issues.apache.org/jira/browse/CASSANDRA-17955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17622153#comment-17622153
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Stefan Miklosovic commented on CASSANDRA-17955:
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[~dcapwell] any progress here? Have you been thinking about consequences of
having single threaded snapshots during repairs?
> Race condition on repair snapshots
> ----------------------------------
>
> Key: CASSANDRA-17955
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17955
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Repair, Local/Snapshots
> Reporter: Cameron Zemek
> Assignee: Stefan Miklosovic
> Priority: Normal
> Labels: 4.0
> Fix For: 4.0.x, 4.1-rc, 4.x
>
> Attachments: signature.asc
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> If an endpoint is convicted and that endpoint is a coordinator then
> ActiveRepairService::removeParentRepairSession is called.
> The issue is that this occurs on clearSnapshotExecutor and can happen while
> RepairMessageVerbHandler is in process of taking a snapshot. So then you get
> a race condition and clearSnapshot will throw a
> java.nio.file.DirectoryNotEmptyException
>
> {code:java}
> public static void deleteRecursiveWithThrottle(File dir, RateLimiter
> rateLimiter)
> {
> if (dir.isDirectory())
> {
> String[] children = dir.list();
> for (String child : children)
> deleteRecursiveWithThrottle(new File(dir, child), rateLimiter);
> }
> // The directory is now empty so now it can be smoked
> deleteWithConfirmWithThrottle(dir, rateLimiter);
> } {code}
> Due to the directory not being empty when it goes to remove the directory at
> the end.
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