How Do I Fix Region Overlapping?

Question

When the HBaseFsck tool is used to check the region status in MRS 3.x and later versions, if the log contains ERROR: (regions region1 and region2) There is an overlap in the region chain or ERROR: (region region1) Multiple regions have the same startkey: xxx, overlapping exists in some regions. How do I solve this problem?

Answer

To rectify the fault, perform the following steps:

1. Run the hbase hbck -repair tableName command to restore the table that contains overlapping.
2. Run the hbase hbck tableName command to check whether overlapping exists in the restored table.
   • If overlapping does not exist, go to 3.
   • If overlapping exists, go to 1.

3. Log in to FusionInsight Manager and choose Cluster > Name of the desired cluster > Services > HBase > More > Perform HMaster Switchover to complete the HMaster active/standby switchover.
4. Run the hbase hbck tableName command to check whether overlapping exists in the restored table.
   • If overlapping does not exist, no further action is required.
   • If overlapping still exists, start from 1 to perform the recovery again.