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https://issues.apache.org/jira/browse/HBASE-8294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13625667#comment-13625667
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Elliott Clark commented on HBASE-8294:
--------------------------------------

Keeping it not a singleton allows testing to be independent much easier.  It 
also allows a more fine grain control over Hconnections and allows two clients 
to connect to different clusters.  

I don't think that we should make it a singleton, perhaps we should add a 
function to get a shared version of the config (maybe getSingleton() )?  Then 
recommend that method for most users.  This would still allow advanced users to 
decide how to create their own configuration
                
> Make HBaseConfiguration a singleton class
> -----------------------------------------
>
>                 Key: HBASE-8294
>                 URL: https://issues.apache.org/jira/browse/HBASE-8294
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, regionserver
>    Affects Versions: 0.95.0
>            Reporter: Himanshu Vashishtha
>            Assignee: Himanshu Vashishtha
>
> HBaseConfiguration.create() calls a new Configuration object. Ideally, we 
> would like to have just one configuration object in the jvm.

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