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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19261) ClusterStatusPublisher where Master could optionally broadcast notice of dead servers is broke
Date Wed, 15 Nov 2017 18:25:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16253902#comment-16253902
] 

stack commented on HBASE-19261:
-------------------------------

See HBASE-12558. [~tianq] took a look and fingered the change in HBASE-12359 as possible point
of breakage.

> ClusterStatusPublisher where Master could optionally broadcast notice of dead servers
is broke
> ----------------------------------------------------------------------------------------------
>
>                 Key: HBASE-19261
>                 URL: https://issues.apache.org/jira/browse/HBASE-19261
>             Project: HBase
>          Issue Type: Bug
>          Components: MTTR
>            Reporter: stack
>
> An old feature that you could optionally enable so Master would broadcast via UDP/Multicast
messages to registered clients when it learned of dead servers is broken in hbase2. It was
added here:
> commit c352a848a1af318df4f0348728fb136ce289d3e4
> Author: nkeywal <nkeywal@unknown>
> Date:   Tue Mar 19 10:07:17 2013 +0000
>     HBASE-7590 Add a costless notifications mechanism from master to regionservers &
clients - new files
> It could help the recalibration of clients on server death run quicker. I have not stats
on how often it was use if at all.
> I tried playing around with it to try and get it going again but need to spend more time
on it. Putting aside for now. 
> We should make it work again and then talk it up as a mechanism that can help improve
MTTR (or strip it).



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