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https://issues.apache.org/jira/browse/MAPREDUCE-471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J resolved MAPREDUCE-471.
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Resolution: Not A Problem
Patch and ticket have gone stale. If you want to pursue this, please reopen and
provide a fresher patch. Also, with MR2 in now, this may be irrelevant - but
don't quote me on that.
> Refactor JobTracker.Expire* arround an utility class
> ----------------------------------------------------
>
> Key: MAPREDUCE-471
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-471
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Brice Arnould
> Priority: Minor
> Attachments: ExpiringHashSet.patch
>
>
> I would like to propose a new class, called ExpiringHashSet, which could
> factorize the code from JobTracker.ExpireLaunchingTasks and
> JobTracker.ExpireTrackers.
> It behaves like an ordinary HashSet, but adds two methods and one argument to
> the constructor.
> That argument, {{lifeTime}}, tells after how much milliseconds an element
> added to the container expire and is removed.
> The first method, {{update(element)}}, takes an element as it argument and
> delay it's expiration by {{lifeTime}} milliseconds.
> The last method, {{makeExpire}} is called by the ExpiringHashSet just before
> it remove an old item. If that method return false, the item won't be removed.
> Nothing expire while we're synchronized on the ExpiringHashSet.
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