[HBASE-7307] MetaReader.tableExists should not return false if the specified table regions has been split

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.92.2, 0.94.3, 0.95.2
• Fix Version/s: 0.94.4, 0.95.0
• Hadoop Flags: Reviewed
• Assignee: rajeshbabu
• Reporter: rajeshbabu
• Created: 08/Dec/12 13:21
• Updated: 26/Feb/13 08:23
• Resolved: 11/Dec/12 23:27

Description

If a region is split parent we are not adding it to META scan results during full scan.

        if (!isInsideTable(this.current, tableNameBytes)) return false;
        if (this.current.isSplitParent()) return true;
        // Else call super and add this Result to the collection.
        super.visit(r);

If all regions of a table has been split then result size will be zero and returning false.

 
    fullScan(catalogTracker, visitor, getTableStartRowForMeta(tableNameBytes));
    // If visitor has results >= 1 then table exists.
    return visitor.getResults().size() >= 1;

Even table is present we are returning false which is not correct(its highly possible in case of tables with one region).