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https://issues.apache.org/jira/browse/YARN-4316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Gong resolved YARN-4316.
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Resolution: Implemented
> Make NM's version information useful for upgrade
> ------------------------------------------------
>
> Key: YARN-4316
> URL: https://issues.apache.org/jira/browse/YARN-4316
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager
> Reporter: Jun Gong
> Assignee: Jun Gong
> Priority: Minor
> Attachments: nodes.png
>
>
> When upgrading all NM to a new bug fix version, we often upgrade some NM
> first, then upgrade rest NM if all looks right. We could avoid breakdown
> whole cluster in this way if new version of NM does not work well. But there
> is no easy way to tell us whether we have missed upgrading some NM.
> We could see all NM's version info in RM's web page as attached. These
> version info are too generic, e.g. 2.4.1, 2.6.1, 2.6.2. For small bug fix
> version, version will remain same. If we could change the version info more
> detailed(e.g. 2.4.1.12), we could make sure whether we have upgrade all NM to
> the new bug fix version.
> I propose to add a new config(yarn.nodemanager.version) in yarn-site.xml to
> solve this problem. When upgrading NM, we configure it to the new version at
> the same time. NM will report this version to RM, then we could see it.
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