@Override
  public void run() {
    while (shouldRun.get() && mayWait()) {
      topologyProbing();
    }
  }
Schedule the {@link #topologyProbing} task either: 1. every PROBING_INTERVAL_MS interval. 2.
Manually triggered by outside events (node restart / register, etc.).
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/manager/load/service/TopologyService.java