[HDFS-9388] Refactor decommission related code to support maintenance state for datanodes

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.9.0, 3.0.0-beta1
• Target Version/s: 3.0.0-beta1
• Assignee: Manoj Govindassamy
• Reporter: Ming Ma
• Created: 06/Nov/15 01:39
• Updated: 08/Aug/17 01:08
• Resolved: 03/Aug/17 00:04

Description

Lots of code can be shared between the existing decommission functionality and to-be-added maintenance state support for datanodes. To make it easier to add maintenance state support, let us first modify the existing code to make it more general.