[HBASE-14824] HBaseAdmin.mergeRegions should recognize both full region names and encoded region names

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.2.0, 1.3.0, 2.0.0
• Component/s: Admin
• Hadoop Flags: Reviewed
• Assignee: Eungsop Yoo
• Reporter: Eungsop Yoo
• Created: 17/Nov/15 05:05
• Updated: 22/Dec/15 10:24
• Resolved: 18/Nov/15 22:28

Description

HBaseAdmin.mergeRegions() calls HBaseAdmin.getRegion() internally. HBaseAdmin.getRegion() requires the full region name. So MetaTableAccessor.getRegion always returns null and this causes one more meta table scan.

  Pair<HRegionInfo, ServerName> getRegion(final byte[] regionName) throws IOException {
    if (regionName == null) {
      throw new IllegalArgumentException("Pass a table name or region name");
    }
    Pair<HRegionInfo, ServerName> pair =
      MetaTableAccessor.getRegion(connection, regionName);
    if (pair == null) {

I suppose to use full region names instead of encoded region names in HBaseAdmin.mergeRegions().