No more panick

server/src/logic/reactor.cpp

@@ -19,3 +19,9 @@ void ChatReactor::OnReadDone(bool ok) {
     Finish(grpc::Status::OK);
   }
 }
+
+void ChatReactor::OnWriteDone(bool ok) {
+  if (!ok) {
+    std::cerr << "Write failed to client" << std::endl;
+  }
+}