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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15549) Undo HMaster carrying regions in master branch as default
Date Tue, 29 Mar 2016 15:51:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15216207#comment-15216207
] 

stack commented on HBASE-15549:
-------------------------------

bq. There's no times that we need to finalize a risky operation and can't.

Your argument is built on no RPCing which is a bit hard to get away with in a distributed
system.

Again, lets do this properly as a discussion thread rather than a back and forth in a JIRA
comment.

> Undo HMaster carrying regions in master branch as default
> ---------------------------------------------------------
>
>                 Key: HBASE-15549
>                 URL: https://issues.apache.org/jira/browse/HBASE-15549
>             Project: HBase
>          Issue Type: Bug
>          Components: Balancer, master
>            Reporter: stack
>         Attachments: 15549.patch
>
>
> I thought we had an issue to do this but I can't find it so here is a new one.
> Currently, in master branch, HMaster is a RegionServer and carries meta regions such
as hbase:meta. Disable this facility by default until better thought through (I think we should
undo master ever carrying regions; FBers are thinking we should go forward with notion that
master carries meta/system regions. TODO). I want to disable it because this facility is not
finished and meantime I want to test new stuff coming in on master branch w/o this new feature
getting in the way.
> Parking here a patch that has how to disable master carrying regions and a probably redundant
test that ensures all works when master is not carrying meta regions (added because it WASN'T
working for me -- but was pilot error).



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