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https://issues.apache.org/jira/browse/HADOOP-11402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14255852#comment-14255852
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Benoy Antony edited comment on HADOOP-11402 at 12/22/14 8:33 PM:
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[~varun_saxena], Can we use Guava
cache(https://code.google.com/p/guava-libraries/wiki/CachesExplained) for
negative cache ?
Most of the added functionality is already encapsulated in Guava cache.
You could also explore the possibility of using the existing Guava cache for
+ve caching for negative caching also.
was (Author: benoyantony):
[~varun_saxena], Can we use Guava
cache(https://code.google.com/p/guava-libraries/wiki/CachesExplained) for
negative cache ?
Most of the added functionality is already encapsulated in Guava cache.
> Negative user-to-group cache entries are never cleared for
> never-again-accessed users
> -------------------------------------------------------------------------------------
>
> Key: HADOOP-11402
> URL: https://issues.apache.org/jira/browse/HADOOP-11402
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Colin Patrick McCabe
> Assignee: Varun Saxena
> Priority: Minor
> Attachments: HADOOP-11402.001.patch
>
>
> Negative user-to-group cache entries are never cleared for
> never-again-accessed users. We should have a background thread that runs
> very infrequently and removes these expired entries.
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