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https://issues.apache.org/jira/browse/AMBARI-12087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14597590#comment-14597590
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Aleksandr Kovalenko commented on AMBARI-12087:
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+1 for the patch
> Rolling Upgrade: downgrade doesn't work
> ---------------------------------------
>
> Key: AMBARI-12087
> URL: https://issues.apache.org/jira/browse/AMBARI-12087
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.1.0
> Reporter: Andrii Tkach
> Assignee: Andrii Tkach
> Priority: Critical
> Fix For: 2.1.0
>
> Attachments: AMBARI-12087.patch, upgrade_stuck.PNG
>
>
> *Steps to reproduce:*
> # Launch Rolling Upgrade
> # make upgrade aborted
> # Click Downgrade
> *Actual result:*
> JS error:
> {code:java}
> Uncaught TypeError: Cannot read property 'get' of undefined
> App.MainAdminStackAndUpgradeController.Em.Controller.extend.downgrade
> {code}
> Downgrade version name doesn't match any repository version:
> {code:java}
> this.get('upgradeVersion')
> "HDP-2.2.6.0-2799"
> App.RepositoryVersion.find().mapProperty('displayName')
> ["HDP-2.2.0.0-2041", "HDP-2.2.6.0"]
> {code}
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