[HBASE-18363] Hbck option to undeploy in memory replica parent region

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Invalid
• Affects Version/s: 1.4.0, 2.0.0-alpha-1
• Component/s: hbck
• Assignee: Hua Xiang
• Reporter: Hua Xiang
• Created: 11/Jul/17 19:17
• Updated: 01/Aug/18 06:21
• Resolved: 19/Jul/17 01:33

Description

We run into cases that with read replica, after split, sometimes, the parent replica region is left in master's in memory onlineRegion list. This results in the region got assigned to a region server. Though the root cause will be fixed by HBASE-18025. We need to enhance hbck tool to fix this in-memory state. Currently, hbck only allows the fix for primary region (in this case, the primary region is gone) with fixAssignment option, please see the following line of code. We will enhance it so it can be applied to replica region as well.

https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java#L2216

Issue Links

• Is contained by: HBASE-18223 Track the effort to improve/bug fix read replica feature