private void updateConfigNodeLeader(TSStatus status) {
    if (status.isSetRedirectNode()) {
      configNodeLeader = status.getRedirectNode();
    } else {
      configNodeLeader = null;
    }
  }
Synchronously send RPC requests to ConfigNode. See confignode.thrift for more details.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/client/sync/SyncConfigNodeClientPool.java