private void initSchemaEngine() {
    long startTime = System.currentTimeMillis();
    SchemaEngine.getInstance().init();
    long endTime = System.currentTimeMillis();
    logger.info("Recover schema successfully, which takes {} ms.", (endTime - startTime));
  }
Generate a list for triggers that do not have jar on this node.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/service/DataNode.java