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https://issues.apache.org/jira/browse/AMBARI-14748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15110483#comment-15110483
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Andrii Babiichuk commented on AMBARI-14748:
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+1 for the patch
> Unable to proceed Assign Slaves step
> ------------------------------------
>
> Key: AMBARI-14748
> URL: https://issues.apache.org/jira/browse/AMBARI-14748
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.4.0
> Reporter: Aleksandr Kovalenko
> Assignee: Aleksandr Kovalenko
> Fix For: 2.4.0
>
> Attachments: AMBARI-14748.patch
>
>
> Go to Install Wizard, go to Assign Slaves and Clients step and immediately
> (in first second) click on Next. JS error will appear and Next button will
> not work until page refresh. If user comes a step back, Next button on Assign
> Masters step will not work too.
> {noformat}
> Uncaught TypeError: Cannot read property 'length' of undefined
> {noformat}
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