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https://issues.apache.org/jira/browse/HDFS-11502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15900070#comment-15900070
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Jeffrey E Rodriguez commented on HDFS-11502:
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Only concern we may have :
Hostname in JVMMetrics uses InetAddress.getLocalHost().getHostName() which may
resolve in some cases to localhost or 127.0.0.0.
At this point I don't know of a better datanode jmx beab property or
method that would reflect the real datanode hostname (FQDN) so we can
differentiate datanodes if there are going through a proxy. (the previous way
would showed the proxy hostname instead because window.location.hostname). In
addition JS window.location may not be a portable way to provide that
information either.
So to community, would like to ask if there is a reliable way available to
datanode JMX beans to show FQDN or hostname of datanode.
> dn.js set datanode UI to window.location.hostname, it should use jmx bean
> property to setup hostname
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-11502
> URL: https://issues.apache.org/jira/browse/HDFS-11502
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 2.7.2, 2.7.3
> Environment: all
> Reporter: Jeffrey E Rodriguez
> Assignee: Jeffrey E Rodriguez
> Fix For: 2.8.0, 2.7.3, 3.0.0-alpha1, 3.0.0-alpha2
>
> Attachments: HDFS-11502.001.patch, HDFS-11502.002.patch
>
>
> Datanode UI calls "dn.js" which loads properties for datanode. "dn.js" sets
> "data.dn.HostName" datanode UI to "window.location.hostname", it should use a
> datanode property from jmx beans or an appropriate property. The issue is
> that if we use a proxy to access datanode UI we would show proxy hostanme
> instead of actual datanode hostname.
> I am proposing using Hadoop:service=DataNode,name=JvmMetrics" tag.Hostname
> field to do that.
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