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From "Jinho Kim (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-250) QueryMaster must send the query finish heartbeat.
Date Sun, 13 Oct 2013 14:48:42 GMT

    [ https://issues.apache.org/jira/browse/TAJO-250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793675#comment-13793675
] 

Jinho Kim commented on TAJO-250:
--------------------------------

++1
Great work!! Ship it! 

> QueryMaster must send the query finish heartbeat.
> -------------------------------------------------
>
>                 Key: TAJO-250
>                 URL: https://issues.apache.org/jira/browse/TAJO-250
>             Project: Tajo
>          Issue Type: Bug
>          Components: master, web UI
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.2-incubating
>
>         Attachments: TAJO-250_2.patch, TAJO-250.patch
>
>
> In the current implementation, QueryMaster only depends on its heartbeat thread for all
kinds of reports. When a query master task without any succeeded report is moved to the finished
list, the finish report may be omitted. As a result, QueryJobManager occasionally does not
update the finish state (e.g., finish time and query state) for some queries even though the
queries are already finished. This patch fixes this bug.



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