@Override
  public void initTProcessor() throws InstantiationException {
    processor = new IConfigNodeRPCService.Processor<>(configNodeRPCServiceProcessor);
  }
ConfigNodeRPCServer exposes the interface that interacts with the DataNode
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/service/thrift/ConfigNodeRPCService.java