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https://issues.apache.org/jira/browse/YARN-10398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17183395#comment-17183395
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Wanqiang Ji commented on YARN-10398:
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Thanks [~wzzdreamer] for the work. As I know the YARN Shared Cache is used to
all YARN applications, but this PR is related to the MapReduce, so I think we
should move it to MAPREDUCE project.
> Every NM will try to upload Jar/Archives/Files/Resources to Yarn Shared Cache
> Manager Like DDOS
> -----------------------------------------------------------------------------------------------
>
> Key: YARN-10398
> URL: https://issues.apache.org/jira/browse/YARN-10398
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn
> Affects Versions: 2.9.0, 3.0.0, 3.1.0, 2.9.1, 3.0.1, 3.0.2, 3.2.0, 3.1.1,
> 2.9.2, 3.0.3, 3.0.4, 3.1.2, 3.3.0, 3.2.1, 2.9.3, 3.1.3, 3.2.2, 3.1.4, 3.4.0,
> 3.3.1, 3.1.5
> Reporter: zhenzhao wang
> Assignee: zhenzhao wang
> Priority: Major
>
> The design of yarn shared cache manager is only to allow application master
> should upload the jar/files/resource. However, there was a bug in the code
> since 2.9.0. Every node manager that take the job task will try to upload the
> jar/resources. Let's say one job have 5000 tasks. Then there will be up to
> 5000 NMs try to upload the jar. This is like DDOS and create a snowball
> effect. It will end up with inavailability of yarn shared cache manager. It
> wil cause time out in localization and lead to job failure.
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