This code restore the snapshots of all HBase tables saved using the script HBaseBackup.rb (https://gist.github.com/umbertogriffo/fe1bce24f8e9ee68c75f). Tested on CDH-5.4.4-1

HBaseRestore.rb

# To execute script launch this command on shell: hbase shell HBaseRestore.rb

include Java

java_import org.apache.hadoop.hbase.HBaseConfiguration
java_import org.apache.hadoop.hbase.client.HBaseAdmin
java_import org.apache.hadoop.hbase.snapshot.ExportSnapshot
java_import org.apache.hadoop.hbase.TableExistsException
java_import org.apache.hadoop.util.ToolRunner

@conf = org.apache.hadoop.hbase.HBaseConfiguration.create

@admin = org.apache.hadoop.hbase.client.HBaseAdmin.new(@conf)

def restore_snapshots()
    snapshots = @admin.listSnapshots(".*-BACKUP-.*").to_a
    snapshots.each { |s|
        name = s.name.scan(/(.*)-BACKUP-/)[0][0]
        puts "-----> restore table "+name+" from snapshot " + s.name
        begin
          @admin.cloneSnapshot(s.name.to_java_bytes,name.to_java_bytes)          
        rescue org.apache.hadoop.hbase.TableExistsException => e
          puts "Table Already Exist!"
        end
     
    }
end

puts "-----> Starting restore"

restore_snapshots()

puts "-----> Done"

exit 0