Zero KB region overlap
Know how to troubleshoot issues related to the 0 KB region overlapping.
Condition
Multiple regions with the same start key, some with 0 KB data.
Cause
Empty regions exist after the failed splits.
Remedy
Run the following commands to fix the issue.
hdfs dfs -mv /hbase/data/<namespace>/<table>/<zero-kb-region> /tmp/
hbase hbck -j <hbck2-jar> extraRegionsInMeta <namespace>:<table> --fix
If the issue persists, continue with the region merges as mentioned in the Overlapping regions-same start key section.
