public String getTableListAsString() {
    StringBuilder sb = new StringBuilder();
    sb.append("{");
    sb.append(StringUtils.join(backupTableInfoMap.keySet(), ","));
    sb.append("}");
    return sb.toString();
  }
Get new region server log timestamps after distributed log roll
@return new region server log timestamps
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/BackupInfo.java