[jira] [Updated] (HBASE-4359) Show dead RegionServer names in the HMaster info page

["Harsh J (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-4359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Harsh J updated HBASE-4359:
---------------------------

    Attachment: HBase Master UI - Dead Servers.png
                HBASE-4359.r1.diff

Jamon+tests patch that adds in the improvement. Please review!

I ran the updated master status servlet test.

{code}
-> mvn -Dtest=TestMasterStatusServlet test
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.apache.hadoop.hbase.master.TestMasterStatusServlet
Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.93 sec

Results :

Tests run: 5, Failures: 0, Errors: 0, Skipped: 0
{code}

I also ran the build manually via bin/start-hbase.sh with proper config and HDFS running. The screenshot shows the implementation.

Thanks in advance for reviews!

> Show dead RegionServer names in the HMaster info page
> -----------------------------------------------------
>
>                 Key: HBASE-4359
>                 URL: https://issues.apache.org/jira/browse/HBASE-4359
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 0.90.4
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Trivial
>             Fix For: 0.94.0
>
>         Attachments: HBASE-4359.r1.diff, HBase Master UI - Dead Servers.png
>
>
> Unlike other components of the cluster, like NameNode and JobTracker pages, the HMaster's info page does not show any data on dead region servers. While an RS is stateless being a good reason not to count dead nodes, I think having a list of dead nodes helps in cases where an administrator would want to find out which nodes are missing out on RS action (hey, everyone likes consistently spiking graphs! ;)).
> Following HBASE-3580, I think it makes sense to have a list of already maintained dead nodes show up in the info UI.

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