[HADOOP-12450] UserGroupInformation should not log at WARN level if no groups are found

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: security
• Assignee: Elliott Neil Clark
• Reporter: Elliott Neil Clark
• Created: 29/Sep/15 18:03
• Updated: 30/Aug/16 01:22
• Resolved: 18/Oct/15 11:24

Description

HBase tries to get the groups of a user on every request. That user may or may not exist on the box running Hadoop/HBase.

If that user doesn't exist currently Hadoop will log at the WARN level everytime. This leads to gigs of log spam and serious GC issues.

Issue Links

• relates to: HBASE-14512 Cache UGI groups