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https://issues.apache.org/jira/browse/AMBARI-24840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Lysnichenko resolved AMBARI-24840.
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Resolution: Fixed
> Change Hostname does not honor uppercase hosts
> ----------------------------------------------
>
> Key: AMBARI-24840
> URL: https://issues.apache.org/jira/browse/AMBARI-24840
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.6.1
> Reporter: Dmitry Lysnichenko
> Assignee: Dmitry Lysnichenko
> Priority: Critical
> Labels: pull-request-available
> Fix For: 2.8.0
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> During the [Ambari change hostname
> procedure|https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.2.0/bk_ambari-administration/content/ch_changing_host_names.html],
> hostnames in configs when they were all uppercase are not being replaced. I
> think the code is converting hosts to all lowercase to do replacements. See:
> https://github.com/apache/ambari/blob/trunk/ambari-server/src/main/java/org/apache/ambari/server/update/HostUpdateHelper.java#L383-L393
> Appears to affect up from 2.6.1 and 2.6.2
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