[HBASE-20741] Split of a region with replicas creates all daughter regions and its replica in same server

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.0.0
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.1
• Component/s: read replicas
• Hadoop Flags: Reviewed
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 15/Jun/18 11:57
• Updated: 08/Jan/20 08:33
• Resolved: 06/Sep/18 11:16

Description

Generally it is better that the parent region when split creates the daughter region in the same target server.
But for replicas also we do the same and all the replica regions are created in the same target server. We should ideally be doing a round robin and only the primary daughter region should be opened in the intended target server (where the parent was previously opened).
huaxiang FYI.

Issue Links

• relates to: HBASE-23659 BaseLoadBalancer#wouldLowerAvailability should consider region replicas
• links to: RB link