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https://issues.apache.org/jira/browse/YARN-547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Omkar Vinit Joshi reassigned YARN-547:
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Assignee: Omkar Vinit Joshi
> New resource localization is tried even when Localized Resource is in
> DOWNLOADING state
> ---------------------------------------------------------------------------------------
>
> Key: YARN-547
> URL: https://issues.apache.org/jira/browse/YARN-547
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Omkar Vinit Joshi
> Assignee: Omkar Vinit Joshi
>
> At present when multiple containers try to request a localized resource
> 1) If the resource is not present then first it is created and Resource
> Localization starts ( LocalizedResource is in DOWNLOADING state)
> 2) Now if in this state multiple ResourceRequestEvents come in then
> ResourceLocalizationEvents are fired for all of them.
> Most of the times it is not resulting into a duplicate resource download but
> there is a race condition present there.
> Location : ResourceLocalizationService.addResource .. addition of the request
> into "attempts" in case of an event already exists.
> The root cause for this is the presence of FetchResourceTransition on
> receiving ResourceRequestEvent in DOWNLOADING state.
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