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https://issues.apache.org/jira/browse/ACCUMULO-3837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14559196#comment-14559196
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Eric Newton commented on ACCUMULO-3837:
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bq. Why not centralize this in the monitor that we can wait to get the instance
name once before the HTTP server comes up instead of in each servlet?
Well, it is centralized, in that it is done in {{BasicServlet}}, from which all
the other servlets are derived. But the instance name is not fetched until it
is needed. which I think is more your point.
I'll fix that, too.
> "Instance Name: null" appears when Monitor first starts
> -------------------------------------------------------
>
> Key: ACCUMULO-3837
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3837
> Project: Accumulo
> Issue Type: Bug
> Components: monitor
> Reporter: Josh Elser
> Assignee: Eric Newton
> Fix For: 1.6.3, 1.8.0, 1.7.1
>
>
> This is one of those infuriating "it's always been like this" bugs with the
> monitor.
> The monitor lazily initializes itself with information from the Master. One
> of these is the Instance Name for the cluster. So, when you first visit the
> monitor, you'll notice that you get "Instance Name: null" in the header.
> Eventually the actual instance name will get filled in. We can do better than
> propagate "null" to our users. The monitor knows the directory in HDFS and
> thus the instance ID. It can also get the instance name from the mapping in
> HDFS. Best as I understand, it's just lazy that we don't do this.
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