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https://issues.apache.org/jira/browse/TAJO-1424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14371011#comment-14371011
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Jinho Kim commented on TAJO-1424:
---------------------------------

You’re right. RpcConnectionPool should be renamed

Anyway.  If a client reference count is one, It execute following 
getConnection() -> selectDatabase() -> close() -> getConnection() -> getTable() 
-> close()

IdleStageHandler would be better than the reference counter
http://netty.io/4.0/api/io/netty/handler/timeout/IdleStateHandler.html


> Investigate the problem of too many "Try to connect" messeges during Travic 
> CI build
> ------------------------------------------------------------------------------------
>
>                 Key: TAJO-1424
>                 URL: https://issues.apache.org/jira/browse/TAJO-1424
>             Project: Tajo
>          Issue Type: Task
>            Reporter: Jihoon Son
>            Assignee: Dongjoon Hyun
>         Attachments: TAJO-1424.patch
>
>
> See the title. 
> After TAJO-1391, Travis emits too many "Try to connect" messeges, and finally 
> reaches the 10000 line limit.



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