addFsRegionsMissingInMeta (Hbck2)
Use the addFsRegionsMissingInMeta command to re-add regions to the hbase:meta table when the corresponding region directories exist in HDFS but are missing from hbase:meta.
This issue often occurs if hbck1 OfflineMetaRepair was run against an HBase 2.x cluster.
Info
hbase:meta must be online for this command to work.
Command
hbase hbck -j <path-to-Hbck2-jar> addFsRegionsMissingInMeta [OPTIONS] [<NAMESPACE|NAMESPACE:TABLENAME>... | -i <INPUTFILES>...]
Options
Option | Description |
-i, --inputFiles <file1> [<file2>...] | Take one or more files containing namespace or table names (one per line) as input. |
-o, --outputFile <name|prefix> | Name/prefix of the file(s) to dump region names. These output files can then be used as input for the assigns command. |
-n, --numLines <arg> | Number of lines (maximum) to be written to each output file when used in conjunction with -o. If -o is specified but -n is not, all region names will be dumped into a single file. |
What the Command Does
- Compares regions listed in hbase:meta with region directories in HDFS\
- Identifies regions missing from hbase:meta\
- Recreates region entries by reading their regioninfo from HDFS\
- Inserts them into hbase:meta in CLOSED state (not assigned, not cached)
Post-Run Actions
- Run the printed assign commands to bring the re-created regions online
- For HBase < 2.3.0, perform a rolling HMaster restart
- before* running assignments
Usage Examples
Example 1
hbase hbck -j <path-to-Hbck2-jar> addFsRegionsMissingInMeta default:tbl_1 n1:tbl_2 n2
Example 2
hbase hbck -j <path-to-Hbck2-jar> addFsRegionsMissingInMeta -i fileName1 fileName2
Example 3
hbase hbck -j <path-to-Hbck2-jar> addFsRegionsMissingInMeta \
-o outputFilePrefix \
-n 100 \
-i fileName1 fileName2
Related Commands
- reportMissingRegionsInMeta\
- fixMeta