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https://issues.apache.org/jira/browse/TAJO-1282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266418#comment-14266418
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Hyunsik Choi commented on TAJO-1282:
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It's an initial work. There still remain works.

> Cleanup the relationship of QueryInProgress and QueryJobManager
> ---------------------------------------------------------------
>
>                 Key: TAJO-1282
>                 URL: https://issues.apache.org/jira/browse/TAJO-1282
>             Project: Tajo
>          Issue Type: Improvement
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.10
>
>         Attachments: TAJO-1282.patch
>
>
> Each QueryInProgress instance maintains an individual event handler involving 
> each thread. It complicates the relationship between QueryJobManager and 
> QueryInprogress. The main objective of this issue is to remove each event 
> handler from QueryInProgress and distinguishes their roles of both classes.



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