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https://issues.apache.org/jira/browse/AMBARI-20915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16760313#comment-16760313
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David Tucker commented on AMBARI-20915:
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I think I may have just hit this with Ambari 2.7.1.0...
Looks like this may be the same as (or at least related to)
https://issues.apache.org/jira/browse/AMBARI-7765.
The presentation wasn't registration failure, though, it was failure to deploy
with Kerberos (via API/Blueprint).
> socket.getfqdn() could return wrong host name due to Python Issue5004
> ---------------------------------------------------------------------
>
> Key: AMBARI-20915
> URL: https://issues.apache.org/jira/browse/AMBARI-20915
> Project: Ambari
> Issue Type: Bug
> Components: ambari-agent
> Affects Versions: 2.5.2
> Reporter: Danula Eranjith
> Priority: Major
>
> Configured fqdn in /etc/hosts will not be returned by socket.getfqdn() which
> could result in host registration failure.
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