👀 Views: 30 💬 Answers: 1 📅 Created: 2025-08-30

google-cloud-pubsub node.js express JavaScript

I'm trying to figure out I'm stuck on something that should probably be simple. I'm experiencing issues with acknowledging messages from a Pub/Sub subscription in my Node.js Express application. My messages are being processed, but they remain unacknowledged and are being redelivered, which leads to processing the same message multiple times. Here’s the relevant part of my code where I setup the subscription and process the incoming messages: ```javascript const express = require('express'); const { PubSub } = require('@google-cloud/pubsub'); const app = express(); const pubsub = new PubSub(); const subscriptionName = 'my-subscription'; const subscription = pubsub.subscription(subscriptionName); subscription.on('message', message => { console.log(`Received message: ${message.id}`); // Simulating some processing delay setTimeout(() => { console.log(`Processing message: ${message.data.toString()}`); // Acknowledge the message after processing message.ack(); }, 10000); // 10 seconds delay }); ``` I've also set the acknowledgment deadline to 10 seconds, expecting that the message will be acknowledged after processing it. However, if my processing takes longer than the acknowledgment deadline, the message seems to be redelivered before I can call `message.ack()`. I tried increasing the acknowledgment deadline like this: ```javascript subscription.on('message', message => { message.setAckDeadline(60); // 60 seconds }); ``` But I still encounter the same issue. I am using the latest versions of `@google-cloud/pubsub` and Node.js. Are there any best practices or configurations I might be missing to ensure that messages are acknowledged properly after processing? Any help would be greatly appreciated! This is part of a larger application I'm building. What am I doing wrong? The project is a REST API built with Javascript. I'm developing on Windows 11 with Javascript. Thanks for your help in advance!