[HDDS-7788] Ratis OverReplicationHandler should exclude stale replicas

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: SCM
• Labels: pull-request-available
• Assignee: Stephen O'Donnell
• Reporter: Stephen O'Donnell
• Created: 16/Jan/23 17:34
• Updated: 18/Jan/23 12:02
• Resolved: 18/Jan/23 12:02

Description

As a stale DN is more than likely dead, in the RatisOverReplicationHandler we should exclude stale replicas before checking for over-replication. That way, we will not allow stale replicas to count toward over-replication. If we continue consider a stale replica as "present" for over-replication, we may remove another replica and then the stale one could go dead and get removed too, resulting in under replication.

Issue Links

• links to: GitHub Pull Request #4183