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Michael Stack commented on HBASE-24273: --------------------------------------- bq. The cached info in hbck_chore seems to give stale info even after the above case is fixed. Report can be stale, yes, that is allowed (normally, runs once a day...). What you thinking? Looking, when we load from the FS the list of Regions in HbckChore, we just add the Region if not in hbase:meta. Seems like need to check if active references at this point. > 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 > Priority: Critical > Fix For: 3.0.0, 2.3.0 > > > 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 > will lead to stale HFile references in child region which will cause its 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)