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https://issues.apache.org/jira/browse/HBASE-8218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617387#comment-13617387
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Ted Yu commented on HBASE-8218:
-------------------------------

HTablePool is being deprecated.
We'd better not introduce it into AggregationClient.

When user application is done with using AggregationClient, setHTable(null) can 
be called where we call close on the previously passed HTable instance.
                
> pass HTable as a parameter to method of AggregationClient
> ---------------------------------------------------------
>
>                 Key: HBASE-8218
>                 URL: https://issues.apache.org/jira/browse/HBASE-8218
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client, Coprocessors
>    Affects Versions: 0.94.3
>            Reporter: cuijianwei
>
> In AggregationClient, methods such as max(...), min(...) pass 'tableName' as 
> a parameter, then a HTable will be created in the method, before the method 
> return, the created HTable will be closed.
> The process above may be heavy because each call must create and close a 
> HTable. The situation becomes worse when there is only one thread access 
> HBase using AggregationClient. The underly HConnection of created HTable will 
> also be created and then closed each time when we invoke these method because 
> no other HTables using the HConnection. This operation is heavy. Therefore, 
> can we add another group of methods which pass HTable or HTablePool as a 
> parameter to methods defined in AggregationClient? 

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