[HIVE-21913] GenericUDTFGetSplits should handle usernames in the same way as LLAP

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2.0, 4.0.0
• Fix Version/s: 3.2.0, 4.0.0-alpha-1
• Target Version/s: 3.2.0, 4.0.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 21/Jun/19 18:00
• Updated: 17/Nov/22 08:50
• Resolved: 24/Jun/19 22:39

Description

LLAP ZK registry namespacing includes current user name which is typically hive. But in some deployments, usernames are created with '' like hive_dev. RegistryUtils.currentUser() (that LLAP uses) replaces '' with '-' for DNS reasons. But GenericUDTFSplits uses UGI login user which does not do the underscore replacement. As a result, LlapBaseInputFormat is finding any LLAP daemons even though they are running.