protected String getMessage(Exception e) {
    String msg = e.getMessage();
    if (msg == null || msg.equals("")) {
      msg = e.getClass().getName();
    }
    return msg;
  }
Begin the overall backup.
@param backupInfo backup info
@throws IOException exception
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/TableBackupClient.java