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https://issues.apache.org/jira/browse/AMBARI-24116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16515441#comment-16515441
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Andrii Tkach commented on AMBARI-24116:
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committed to trunk
> Web Client Pulls Back Too Much Information in Upgrade Wizard
> ------------------------------------------------------------
>
> Key: AMBARI-24116
> URL: https://issues.apache.org/jira/browse/AMBARI-24116
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.7.0
> Reporter: Andrii Tkach
> Assignee: Andrii Tkach
> Priority: Critical
> Labels: pull-request-available
> Fix For: 2.7.0
>
> Attachments: upgrade.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> During an upgrade, the upgrade wizard is very inefficient at the data that it
> pulls back. On larger upgrades, expanding groups in progress is practically
> unusable and can actually cause the browser to crash.
> I recently observed this on a small upgrade but quickly opening and closing
> the active group (see screenshot). The expansion of groups/tasks just sat
> there spinning.
> I think that the upgrade wizard needs to pull back a lot less data and
> possibly cache the majority of what it has in order to make it usable during
> a larger upgrade.
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