[jira] [Updated] (YARN-9273) Flexing a component of YARN service does not work as documented when using relative number

["Masahiro Tanaka (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-9273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Masahiro Tanaka updated YARN-9273:
----------------------------------
    Attachment: YARN-9273.002.patch

> Flexing a component of YARN service does not work as documented when using relative number
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-9273
>                 URL: https://issues.apache.org/jira/browse/YARN-9273
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Masahiro Tanaka
>            Assignee: Masahiro Tanaka
>            Priority: Minor
>         Attachments: YARN-9273.001.patch, YARN-9273.002.patch
>
>
> [The documents|https://hadoop.apache.org/docs/r3.2.0/hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html] says,
>  "Relative changes are also supported for the ${NUMBER_OF_CONTAINERS} in the flex command, such as +2 or -2." when you want to flex a component of a YARN service.
> I expected that {{yarn app -flex sleeper-service -component sleeper +1}} increments the number of container, but actually it sets the number of container to just one.
> I guess ApiServiceClient#actionFlex treats flexing when executing the {{yarn app -flex}}, and it just uses {{Long.parseLong}} to convert the argument like {{+1}}, which doesn't care relative numbers.



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