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https://issues.apache.org/jira/browse/YARN-2183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14181684#comment-14181684
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Karthik Kambatla commented on YARN-2183:
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bq. Without this check, we would have two cleaner runs back to back which is
somewhat wasteful.
I don't entirely remember my train of thought, but I can take a look again and
see if we can implement it in a simpler way and get the same guarantee. May be,
after the next patch.
bq. Currently CleanerTask.cleanResourceReferences() is generic: i.e. it does
not depend on the type of the store.
Can we keep this method as is, but mark it protected. The store implementations
can choose to use it.
> Cleaner service for cache manager
> ---------------------------------
>
> Key: YARN-2183
> URL: https://issues.apache.org/jira/browse/YARN-2183
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Chris Trezzo
> Assignee: Chris Trezzo
> Attachments: YARN-2183-trunk-v1.patch, YARN-2183-trunk-v2.patch,
> YARN-2183-trunk-v3.patch, YARN-2183-trunk-v4.patch, YARN-2183-trunk-v5.patch
>
>
> Implement the cleaner service for the cache manager along with metrics for
> the service. This service is responsible for cleaning up old resource
> references in the manager and removing stale entries from the cache.
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