reportMissingRegionsInMeta (Hbck2)

Reports regions that exist as directories in HDFS but are missing from hbase:meta. This command is check-only and performs no repairs. The hbase:meta table must be online to run this command.

Command Syntax

hbase hbck -j <path-to-hbck2-jar> reportMissingRegionsInMeta [<NAMESPACE | NAMESPACE:TABLENAME>... | -i <INPUT_FILE>...]

Options

-i, --inputFiles <file1> [<file2>...] Specifies one or more files containing namespaces or table names, one per line.

Description

This command compares:

Regions listed in hbase:meta, and
Region directories present in HDFS

For each specified namespace or table, it identifies region directories on HDFS that do not have a corresponding entry in hbase:meta. These are reported as missing regions and are grouped by table.

If a table has no missing regions, the command prints a “no missing regions” message.

You may specify:

One or more table names,
One or more namespaces, or
Any combination of both

If no arguments are provided, the command checks all regions across the cluster.

Info

When specifying table names, always include the namespace (for example, default:my_table). Table names without namespaces may be misinterpreted as namespaces.

To repair missing regions by adding them back into hbase:meta, use the addFsRegionsMissingInMeta command.

Examples

Report missing regions for table_1 and table_2 in the default namespace:

hbase hbck -j <path-to-hbck2-jar> reportMissingRegionsInMeta default:table_1 default:table_2

Report missing regions for table_1 in the default namespace and for all tables in the namespace ns1:

hbase hbck -j <path-to-hbck2-jar> reportMissingRegionsInMeta default:table_1 ns1

Report missing regions for tables listed in fileName1 and fileName2:

hbase hbck -j <path-to-hbck2-jar> reportMissingRegionsInMeta -i fileName1 fileName2