public static void main(String[] args) {
    logger.info("IoTDB-DataNode environment variables: {}", IoTDBConfig.getEnvironmentVariables());
    logger.info("IoTDB-DataNode default charset is: {}", Charset.defaultCharset().displayName());
    DataNode dataNode = new DataNode();
    int returnCode = dataNode.run(args);
    if (returnCode != 0) {
      System.exit(returnCode);
    }
  }
Responsible for keeping trigger information up to date.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/service/DataNode.java