Syeda Arshiya Tabreen created HBASE-21924:
---------------------------------------------
Summary: Region assignment will fail, if reference files are
copied into new region while running HBCK -fixHdfsOverlaps command
Key: HBASE-21924
URL: https://issues.apache.org/jira/browse/HBASE-21924
Project: HBase
Issue Type: Bug
Components: hbck
Reporter: Syeda Arshiya Tabreen
Assignee: Syeda Arshiya Tabreen
Consider we have overlapping regions which contains reference files,
when *-fixHdfsOverlaps* hbck command is run due to region overlap,a new region
is created and all data is merged into the new region along with the reference
files if present.
For example:
1.create table 't'
2.Insert records \{00,111,200} into the table 't'and flush the data
3.split the table 't' with split-key '100'
4.Now we have three regions( 1 parent and two daughter regions )
1.*parent_region*('Empty','Empty') => \{00,111,200}
2.*daughter_region-1*('Empty','100')=>\{00}
3.*daughter_region-2*('100','Empty')=>\{111,200}
5.Make sure parent_region is not deleted and also references of parent region
are not cleaned for the daughter regions in file system and run
*-fixHdfsOverlaps* command
The command will copy all the data of overlapping regions along with the
reference files into new_ region.
when *-fixAssignments* hbck command is run to fix assignment issues in
table,the new_region wont be assigned as reference files which is present in it
will be pointing to the parent_region ( -fixHdfsOverlaps command will move all
the data into new region and sideline the other overlapped regions) and it will
try assigning the parent_region which does not exist.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
