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Posted to dev@uima.apache.org by "Lou DeGenaro (JIRA)" <de...@uima.apache.org> on 2017/02/24 21:14:44 UTC

[jira] [Work started] (UIMA-5334) DUCC Web Server (WS) sometimes incorrectly shows DB down

     [ https://issues.apache.org/jira/browse/UIMA-5334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on UIMA-5334 started by Lou DeGenaro.
------------------------------------------
> DUCC Web Server (WS) sometimes incorrectly shows DB down
> --------------------------------------------------------
>
>                 Key: UIMA-5334
>                 URL: https://issues.apache.org/jira/browse/UIMA-5334
>             Project: UIMA
>          Issue Type: Bug
>          Components: DUCC
>            Reporter: Lou DeGenaro
>            Assignee: Lou DeGenaro
>             Fix For: 2.2.1-Ducc
>
>
> Presently, WS queries DB for Machines data to determine if DB is alive.  However when Resource Manager (RM) is recycled it clears the table and then rebuilds it.  WS may get fooled that DB is not functional for a short period of time when in fact it is functional.
> WS should query DB ckpt table, since it will always respond with data, to determine aliveness.



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