[HADOOP-9545] Improve logging in ActiveStandbyElector

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 2.1.0-beta
• Component/s: auto-failover, ha
• Target Version/s: 2.1.0-beta
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 06/May/13 18:33
• Updated: 24/Apr/18 01:34
• Resolved: 24/Apr/18 01:34

Description

The ActiveStandbyElector currently logs a lot of stuff at DEBUG level which would be useful for troubleshooting. We've seen one instance in the wild of a ZKFC thinking it should be in standby state when in fact it won the election, but the logging is insufficient to understand why. I'd like to bump most of the existing DEBUG logs to INFO and add some additional logs as well.