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https://issues.apache.org/jira/browse/CASSANDRA-16815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17388904#comment-17388904
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Yifan Cai commented on CASSANDRA-16815:
---------------------------------------

[~brandon.williams], general replacement, as long as not replacing with the 
same address. In this case, the new (replacing) node gets a new host ID. The 
change was added in CASSANDRA-8523.

> Background schedule to clean up orphaned hints files
> ----------------------------------------------------
>
>                 Key: CASSANDRA-16815
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16815
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Yifan Cai
>            Assignee: Yifan Cai
>            Priority: Normal
>
> Host replacement is possible to produce orphaned hints files that the 
> original associated host ID no longer exist in the cluster (i.e., being 
> replaced). Those orphaned hints files will not be dispatched and only 
> consumes up the disk space. 
> We can have a background schedule that infrequently checks and deletes the 
> files if they are orphaned and have exceeded the TTL. 



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