[jira] [Commented] (YARN-4102) Add a "skip existing table" mode for timeline schema creator

["Joep Rottinghuis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-4102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14729390#comment-14729390 ] 

Joep Rottinghuis commented on YARN-4102:
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Yup that looks good. I noticed one more thing, you decide if that should be changed or not, but the createTable method throws an IOException but you catch the more generic Exception. Would it make sense to catch only IOExceptions?

> Add a "skip existing table" mode for timeline schema creator
> ------------------------------------------------------------
>
>                 Key: YARN-4102
>                 URL: https://issues.apache.org/jira/browse/YARN-4102
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Li Lu
>            Assignee: Li Lu
>         Attachments: YARN-4102-YARN-2928.001.patch, YARN-4102-YARN-2928.002.patch
>
>
> When debugging timeline POCs, we may need to create hbase tables that are added in some ongoing patches. Right now, our schema creator will exit when it hits one existing table. While this is a correct behavior with end users, this introduces much trouble in debugging POCs: every time we have to disable all existing tables, drop them, run the schema creator to generate all tables, and regenerate all test data. 
> Maybe we'd like to add an "incremental" mode so that the creator will only create non-existing tables? This is pretty handy in deploying our POCs. Of course, consistency has to be kept in mind across tables. 



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