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From "Josh Elser (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-3837) "Instance Name: null" appears when Monitor first starts
Date Tue, 26 May 2015 16:04:18 GMT


Josh Elser commented on ACCUMULO-3837:

Thanks for making the time to work on this, Eric. The "(Unavailable)" is def an improvement.
I'll have to play with the 0s delay and see how that improvements the user experience.

> "Instance Name: null" appears when Monitor first starts
> -------------------------------------------------------
>                 Key: ACCUMULO-3837
>                 URL:
>             Project: Accumulo
>          Issue Type: Bug
>          Components: monitor
>            Reporter: Josh Elser
>            Assignee: Eric Newton
>             Fix For: 1.6.3, 1.8.0, 1.7.1
>          Time Spent: 50m
>  Remaining Estimate: 0h
> 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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