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https://issues.apache.org/jira/browse/YARN-9013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17771765#comment-17771765
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ASF GitHub Bot commented on YARN-9013:
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slfan1989 opened a new pull request, #6147:
URL: https://github.com/apache/hadoop/pull/6147
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### Description of PR
JIRA: YARN-9013. [BackPort] [GPG] fix order of steps cleaning Registry
entries in ApplicationCleaner.
### How was this patch tested?
Add Junit Test.
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
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> [GPG] fix order of steps cleaning Registry entries in ApplicationCleaner
> ------------------------------------------------------------------------
>
> Key: YARN-9013
> URL: https://issues.apache.org/jira/browse/YARN-9013
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Botong Huang
> Assignee: Botong Huang
> Priority: Major
> Attachments: YARN-9013-YARN-7402.v1.patch,
> YARN-9013-YARN-7402.v2.patch
>
>
> ApplicationCleaner today deletes the entry for all finished (non-running)
> application in YarnRegistry using this logic:
> # GPG gets the list of running applications from Router.
> # GPG gets the full list of applications in registry
> # GPG deletes in registry every app in 2 that’s not in 1
> The problem is that jobs that started between 1 and 2 meets the criteria in
> 3, and thus get deleted by mistake. The fix/right order should be 2->1->3,
> rather than 1->2->3.
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