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https://issues.apache.org/jira/browse/YARN-4640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Templeton resolved YARN-4640.
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Resolution: Invalid
> Replace synchronized HashSet with something from util.concurrent in
> DelegationTokenRenewer
> ------------------------------------------------------------------------------------------
>
> Key: YARN-4640
> URL: https://issues.apache.org/jira/browse/YARN-4640
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Reporter: Daniel Templeton
> Assignee: Daniel Templeton
>
> {code}
> this.referringAppIds = Collections.synchronizedSet(
> new HashSet<ApplicationId>(applicationIds));
> {code}
> should probably be a {{ConcurrentHashMap}}.
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