[Sharded-Execution-GRPC] Address some review comments

execution/executor-service/src/tests.rs

@@ -55,7 +55,6 @@ pub fn create_thread_remote_executor_shards(
 }
 
 #[test]
-#[ignore]
 fn test_sharded_block_executor_no_conflict() {
     use std::thread;
 

secure/net/src/grpc_network_service/mod.rs

@@ -57,9 +57,12 @@ impl GRPCNetworkMessageServiceServerWrapper {
             .unwrap();
 
         info!("Starting Server async at {:?}", server_addr);
-        // NOTE: serve_with_shutdown() starts the server, if successful the task does not return
-        // till the server is shutdown. Hence this should be called as a separate non-blocking task.
-        // Signal handler 'server_shutdown_rx' is needed to shutdown the server
+        // NOTE: (1) serve_with_shutdown() starts the server, if successful the task does not return
+        //           till the server is shutdown. Hence this should be called as a separate
+        //           non-blocking task. Signal handler 'server_shutdown_rx' is needed to shutdown
+        //           the server
+        //       (2) There is no easy way to know if/when the server has started successfully. Hence
+        //           we may need to implement a healthcheck service to check if the server is up
         Server::builder()
             .timeout(std::time::Duration::from_millis(rpc_timeout_ms))
             .add_service(NetworkMessageServiceServer::new(self))

secure/net/src/network_controller/mod.rs

@@ -146,6 +146,9 @@ impl NetworkController {
         self.outbound_task_shutdown_tx = self.outbound_handler.start(&self.outbound_rpc_runtime);
     }
 
+    // TODO: This is still not a very clean shutdown. We don't wait for the full shutdown after
+    //       sending the signal. May not matter much for now because we shutdown before exiting the
+    //       process. Ideally, we want to fix this.
     pub fn shutdown(&mut self) {
         info!("Shutting down network controller at {}", self.listen_addr);
         if let Some(shutdown_signal) = self.inbound_server_shutdown_tx.take() {