[jira] [Updated] (YARN-2826) User-Group mappings not updated by RM when a user is removed from a group.

["Wangda Tan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-2826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wangda Tan updated YARN-2826:
-----------------------------
    Attachment: YARN-2826-1.patch

Thanks for [~sidharta-s] for reporting this issue.

Attached a fix for this.
Offline discussed with [~xgong], he pointed me what happened, thanks to Xuan! What really happened is {{Groups.getUserToGroupsMappingServiceWithLoadedConfiguration(this.conf)}} overwrites the Groups initialized in doSecureLogin. So we should make sure doSecureLogin happens after {{getUserToGroupsMappingServiceWithLoadedConfiguration}}.

And also, HA configuration initialization should happen after configuration initialization, also put it to correct position as well. 

> User-Group mappings not updated by RM when a user is removed from a group.
> --------------------------------------------------------------------------
>
>                 Key: YARN-2826
>                 URL: https://issues.apache.org/jira/browse/YARN-2826
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: sidharta seethana
>            Assignee: Wangda Tan
>            Priority: Critical
>         Attachments: YARN-2826-1.patch
>
>
> Removing a user from a group isn't reflected in getGroups even after a refresh. The following sequence fails in step 7. 
> 1) add test_user to a machine with group1 
> 2) add test_user to group2 on the machine 
> 3) yarn rmadmin -refreshUserToGroupsMappings (expected to refresh user to group mappings) 
> 4) yarn rmadmin -getGroups test_user (and ensure that user is in group2) 
> 5) remove user from group2 on the machine 
> 6) yarn rmadmin -refreshUserToGroupsMappings (expected to refresh user to group mappings) 
> 7) yarn rmadmin -getGroups test_user (and ensure that user NOT in group2) 



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