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https://issues.apache.org/jira/browse/CASSANDRA-16446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17290730#comment-17290730
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Jaroslaw Grabowski commented on CASSANDRA-16446:
------------------------------------------------

Thank you [~Bereng]!

> Parent repair sessions leak may lead to node long pauses
> --------------------------------------------------------
>
>                 Key: CASSANDRA-16446
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16446
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Repair
>            Reporter: Berenguer Blasi
>            Assignee: Berenguer Blasi
>            Priority: Normal
>             Fix For: 4.0-beta5, 4.0
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> {{ActiveRepairService}} keeps  a map `parentRepairSessions`. If these 
> sessions leak, that map can grow to a size when a node restarts 
> {{ActiveRepairService.onRestart()}} triggers a cleanup of sessions that can 
> pause nodes in a cluster for a long time.
> The proposed solution is for repairs to cleanup these sessions on all nodes 
> on completion by sending a CLEANUP message to involved nodes. Tests rely on a 
> new {{parentRepairSessionsCount()}} method on the parent repair sessions 
> MBean to keep track of these.



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