Andrey Elenskiy created HBASE-24273: ---------------------------------------
Summary: HBCK's "Orphan Regions on FileSystem" reports regions with referenced HFiles Key: HBASE-24273 URL: https://issues.apache.org/jira/browse/HBASE-24273 Project: HBase Issue Type: Bug Components: hbck2 Affects Versions: 2.2.4 Environment: HBase 2.2.4 Hadoop 3.1.3 Reporter: Andrey Elenskiy This issue came up after merging regions. MergeTableRegionsProcedure removes the parent regions from hbase:meta and creates HFile references in child region to the old parent regions. Running `hbck_chore_run` right after the `merge_region` will show the parent regions in "Orphan Regions on FileSystem" until major compaction is run on child region which will remove HFile references and cause Catalog Janitor to clean up the parent regions. There are probably other situations which can cause the same issue (maybe region split?) Having "Orphan Regions on FileSystem" list parent regions and suggest to "_hbase completebulkload_" is dangerous in this case as completing bulk load in this case will lead to stale HFile references in child region which will cause it's OPEN to fail because referenced HFile doesn't exist. Figuring out these things for database administrators is tedious, so I think it would be reasonable to not consider regions with referenced HFiles to be orphans (or maybe could give an extra hint saying that it has referenced HFiles). -- This message was sent by Atlassian Jira (v8.3.4#803005)