[HDFS-14127] Add a description about the observer read configuration

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: HDFS-12943
• Fix Version/s: 3.3.0
• Assignee: xiangheng
• Reporter: xiangheng
• Created: 05/Dec/18 09:48
• Updated: 17/Aug/19 11:51
• Resolved: 17/Aug/19 11:40

Description

The lack of description of observer reader configuration in hdfs-default.xml ,That can easily lead users to configure observer read mode to a normal HA mode.