[
https://issues.apache.org/jira/browse/YARN-2183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14183571#comment-14183571
]
Karthik Kambatla commented on YARN-2183:
----------------------------------------
Ah, now I get it. I missed the executor serializing the tasks already. I think
it is okay to use 2 threads in the executor. Otherwise, we are having to
differentiate between scheduled and impromptu cleaner tasks, which is probably
an overkill to achieve this.
We should probably add a comment to explain the choice of 2 threads, which is
"to reduce the chances of running cleaner-tasks back-to-back".
> 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,
> YARN-2183-trunk-v6.patch, on-demand-cleaner.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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
