public void stop() {
    if (!running.getAndSet(false)) {
      return;
    }
    LOG.info("Stopping");
    scheduler.stop();
    timeoutExecutor.sendStopSignal();
  }
@return the time since the current procedure is running
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/ProcedureExecutor.java