public void startWorkers() {
    if (!running.compareAndSet(false, true)) {
      LOG.warn("Already running");
      return;
    }
    timeoutExecutor.start();
    workerMonitorExecutor.start();
    for (WorkerThread workerThread : workerThreads) {
      workerThread.start();
    }
    LOG.info("{} procedure workers are started.", workerThreads.size());
  }
Helper to look up the root Procedure ID.

@param proc given a specified procedure.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/ProcedureExecutor.java