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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4178) [storage implementation] app id as string in row keys can cause incorrect ordering
Date Tue, 29 Sep 2015 18:00:06 GMT

    [ https://issues.apache.org/jira/browse/YARN-4178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14935531#comment-14935531
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Varun Saxena commented on YARN-4178:
------------------------------------

That's a good point.
Yes, would need to handle it. 
As you said, should be doable i.e. records with app id stored as 12 bytes can be considered
old records and > 12, new ones.

> [storage implementation] app id as string in row keys can cause incorrect ordering
> ----------------------------------------------------------------------------------
>
>                 Key: YARN-4178
>                 URL: https://issues.apache.org/jira/browse/YARN-4178
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
>         Attachments: YARN-4178-YARN-2928.01.patch
>
>
> Currently the app id is used in various places as part of row keys. However, currently
they are treated as strings. This will cause a problem with ordering when the id portion of
the app id rolls over to the next digit.
> For example, "app_1234567890_10000" will be considered *earlier* than "app_1234567890_9999".
We should correct this.



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