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https://issues.apache.org/jira/browse/AMBARI-14453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15088586#comment-15088586
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Matt Foley commented on AMBARI-14453:
-------------------------------------
Hi [~lakshmivs], okay, I've changed the Description of this jira to remove the
indication that the hostname case was causing ConnectException, and added your
request for the Ambari UI to be improved as stated.
> Ambari has lowercase hostnames while cluster is installed with uppercase
> hostnames.
> -----------------------------------------------------------------------------------
>
> Key: AMBARI-14453
> URL: https://issues.apache.org/jira/browse/AMBARI-14453
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.2.0
> Reporter: Lakshmi VS
> Assignee: Dmitry Lysnichenko
> Priority: Minor
> Fix For: 2.2.1
>
> Attachments: Ambari.JPG, DataNodes.JPG,
> hbase-hbase-master-N9-1-1.log, hosts.JPG, yarn-yarn-resourcemanager-N9-1-1.log
>
>
> There is inconsistency in the way hostnames are displayed in Ambari when
> uppercase or mixed-case hostnames are used. Most Hadoop interfaces show the
> hostnames in mixed case, but Ambari seems to only use lowercase. For
> example, hosts page displays the names to be lowercase (attached screenshot
> hosts.jpg) while the Namenode UI page shows the datanodes to be uppercase
> (attached screenshot DataNodes.jpg). Hbase Master UI has the same behavior
> too.
> steps:
> 1. Hadoop cluster with below config is installed successfully with uppercase
> hostnames.
> {code}
> CLUSTERNAME='N91'
> MASTER1=N9-1-1.labs
> MASTER2=N9-1-2.labs
> DATANODE1=N9-1-3.labs
> DATANODE2=N9-1-4.labs
> DATANODE3=N9-1-5.labs
> {code}
> Snippet of /etc/hosts file -
> {code}
> 10.0.8.1 N9-1-1.labs N9-1-1 byn001-1 hadoopvm1-1
> 10.0.8.2 N9-1-2.labs N9-1-2 byn001-2 hadoopvm1-2
> 10.0.8.3 N9-1-3.labs N9-1-3 byn001-3 hadoopvm1-3
> 10.0.8.4 N9-1-4.labs N9-1-4 byn001-4 hadoopvm1-4
> 10.0.8.5 N9-1-5.labs N9-1-5 byn001-5 hadoopvm1-5
> {code}
> 2. Ambari host page shows all hostnames to be of lower case.
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