replication (Hbck2)
Identifies issues related to HBase replication and optionally fixes them.
Command Syntax
hbase hbck -j <path-to-hbck2-jar> replication [OPTIONS] [<TABLENAME>... | -i <INPUT_FILE>...]
Options
Option | Description |
-f, --fix | Attempts to correct any replication issues found. |
-i, --inputFiles <file1> [<file2>...] | Specifies one or more input files containing table names, one per line. |
Description
This command checks for common replication-related issues in the cluster. Its primary functions include:
- Detecting undeleted replication queues These queues may remain after RegionServer failures or other operational issues. With --fix, the command attempts to delete these stale queues.
- Checking replication barriers for specified tables If table names are provided—either directly or through an input file—the command inspects replication barriers for those tables. With --fix, it purges outdated or unnecessary barriers.
Cleaning up stale replication metadata helps ensure smooth and consistent replication behavior across the cluster.
Examples
- Report replication issues for all tables:
hbase hbck -j <path-to-hbck2-jar> replication
- Fix replication issues for myreplicatedtable:
hbase hbck -j <path-to-hbck2-jar> replication --fix myreplicatedtable
- Fix replication issues for tables listed in fileName1:
hbase hbck -j <path-to-hbck2-jar> replication --fix -i fileName1