[jira] [Commented] (HBASE-13453) Master should not bind to region server ports

["Enis Soztutar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-13453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14490135#comment-14490135 ] 

Enis Soztutar commented on HBASE-13453:
---------------------------------------

A single node user trying out pseudo-dist mode, or small cluster users who have always hosted another RS in the master node, have to use the local-regionservers.sh script, which is an unnecessary complication on the setup. If we are going the route of lightweight master, we should continue to operate like 0.98 in terms of ports. 

> Master should not bind to region server ports
> ---------------------------------------------
>
>                 Key: HBASE-13453
>                 URL: https://issues.apache.org/jira/browse/HBASE-13453
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Enis Soztutar
>            Assignee: Devaraj Das
>            Priority: Critical
>             Fix For: 2.0.0, 1.1.0
>
>
> In 1.0, master by default binds to the region server ports (rpc and info). We have done it so thinking that in the long term, master and meta co-location will be default, and we can merge the master and region server as a single daemon. 
> Over at HBASE-11165, if the conclusion end up being that meta will not be colocated at all, then master hosting a region server will just become an implementation detail. [~saint.ack@gmail.com] says that we might never allow master to host regions. 
> Now, we are stuck in a state where we have made master bind to RS ports in 1.0, which might create some confusion (and frustration) for small cluster users who traditionally used to host a master and a region server on the same node.
> I think we should undo this in 1.1 and use the previous master ports (16000) and not bind to 16030, so that the user does not need to do anything to bring up a RS on the same host. At least users going from 0.98 -> 1.1 will not take a hit. Users going from 1.0 -> 1.1 will see changed default ports. 



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