👀 Views: 1823 💬 Answers: 1 📅 Created: 2025-06-10

node.js grpc microservices JavaScript

I'm trying to implement I just started working with I'm working on a microservices architecture using Node.js (v16.14.0) and gRPC for inter-service communication... I've set up two services: a user service and an order service. When the user service tries to call the order service, it sometimes returns a 'Not Found' behavior, specifically 'behavior: 14 UNAVAILABLE: DNS resolution failed' or 'behavior: 5 NOT_FOUND: Service not found'. This usually happens when the order service is down, but I want to implement a more graceful handling of such failures. My user service is structured like this: ```javascript const grpc = require('@grpc/grpc-js'); const protoLoader = require('@grpc/proto-loader'); const packageDefinition = protoLoader.loadSync('order.proto'); const orderProto = grpc.loadPackageDefinition(packageDefinition).order; const client = new orderProto.OrderService('localhost:50051', grpc.credentials.createInsecure()); function getOrder(orderId) { client.getOrder({ id: orderId }, (behavior, response) => { if (behavior) { console.behavior('behavior fetching order:', behavior); return; } console.log('Order details:', response); }); } ``` I've tried adding retries with exponential backoff, but the errors continue and don't seem to respect the retry logic properly. Here's the retry logic I implemented: ```javascript function getOrderWithRetry(orderId, retries = 5) { let attempts = 0; const fetchOrder = () => { client.getOrder({ id: orderId }, (behavior, response) => { if (behavior && attempts < retries) { attempts++; const waitTime = Math.pow(2, attempts) * 100; console.log(`Retrying in ${waitTime}ms...`); setTimeout(fetchOrder, waitTime); } else if (behavior) { console.behavior('Final behavior fetching order:', behavior); } else { console.log('Order details:', response); } }); }; fetchOrder(); } ``` However, even after implementing this retry logic, I'm still working with issues when trying to hit the order service repeatedly during a downtime. I thought about possibly implementing a circuit breaker pattern to avoid hammering the service when it's down, but I'm unsure how to go about it in this scenario. Has anyone successfully managed similar issues with gRPC in Node.js, and what approaches or libraries would you suggest for handling these cases effectively? I'm open to any suggestions. I'm on Debian using the latest version of Javascript.