public static String[] getListFromSeparatedString(String commaSeparatedString) {
    return commaSeparatedString.split("\\s*" + TXN_WRITE_EVENT_FILE_SEPARATOR + "\\s*");
  }
Thread to clear old files of cmroot recursively
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/ReplChangeManager.java