[jira] [Updated] (YARN-10652) Capacity Scheduler fails to handle user weights for a user that has a "." (dot) in it

["Siddharth Ahuja (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-10652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siddharth Ahuja updated YARN-10652:
-----------------------------------
    Attachment: Correct user weight of 0.76 picked up for the user with a dot after the patch.png

> Capacity Scheduler fails to handle user weights for a user that has a "." (dot) in it
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-10652
>                 URL: https://issues.apache.org/jira/browse/YARN-10652
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler
>    Affects Versions: 3.3.0
>            Reporter: Siddharth Ahuja
>            Assignee: Siddharth Ahuja
>            Priority: Major
>         Attachments: Correct user weight of 0.76 picked up for the user with a dot after the patch.png, Incorrect default user weight of 1.0 being picked for the user with a dot before the patch.png, YARN-10652.001.patch
>
>
> AD usernames can have a "." (dot) in them i.e. they can be of the format -> {{firstname.lastname}}. However, if you specify a username with this format against the Capacity Scheduler setting -> {{yarn.scheduler.capacity.root.default.user-settings.firstname.lastname.weight}}, it fails to be applied and is instead assigned the default of 1.0f weight. This renders the user weight feature (being used as a means of setting user priorities for a queue) unusable for such users.
> This limitation comes from [1]. From [1], only word characters (A word character: [a-zA-Z_0-9]) (see [2]) are permissible at the moment which is no good for AD names that contain a "." (dot).
> Similar discussion has been had in a few HADOOP jiras e.g. HADOOP-7050 and HADOOP-15395 and the outcome was to use non-whitespace characters i.e. instead of {{\w+}}, use {{\S+}}.
> We could go down similar path and unblock this feature for the AD usernames with a "." (dot) in them.
> [1] https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacitySchedulerConfiguration.java#L1953
> [2] https://docs.oracle.com/javase/tutorial/essential/regex/pre_char_classes.html



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