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

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Target Version/s: 2.6.0
• Hadoop Flags: Reviewed
• Assignee: Wangda Tan
• Reporter: Sidharta Seethana
• Created: 07/Nov/14 02:18
• Updated: 01/Dec/14 03:11
• Resolved: 08/Nov/14 03:46

Description

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)

Issue Links

• is broken by: YARN-2805 RM2 in HA setup tries to login using the RM1's kerberos principal