[jira] [Created] (HBASE-24995) MetaFixer fails to fix overlaps when multiple tables have overlaps

["Mohammad Arshad (Jira)" <ji...@apache.org>]

Mohammad Arshad created HBASE-24995:
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             Summary: MetaFixer fails to fix overlaps when multiple tables have overlaps
                 Key: HBASE-24995
                 URL: https://issues.apache.org/jira/browse/HBASE-24995
             Project: HBase
          Issue Type: Bug
          Components: hbck2
    Affects Versions: 2.2.3, 3.0.0-alpha-1
            Reporter: Mohammad Arshad
            Assignee: Mohammad Arshad


MetaFixer fails to fix overlaps when multiple tables have overlaps
*Steps to reproduce from UT.*
# Create table t1 and t2 with split keys, ["bbb", "ccc", "ddd", "eee"]
# Create extra region in both t1 and t2 with start key "bbb" and end key "ddd"
# Run catalog janitor, It will report total 4 overlaps, 2 from each table.
# Run MetaFixer, wait for merges to finish.
# Run the catalog janitor again and verify report, there should not be any overlap
# Overlap still exists. Reproduced!!!

*Analysis.*
* When I run the same scenario for just one table t1, overlaps are fixed successfully.
* Seems problem with MetaFixer#calculateMerges. 
* I think merges should be calculated within a table. Across the table merge does not have significance.




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