👀 Views: 463 💬 Answers: 1 📅 Created: 2025-06-14

google-cloud-pubsub node.js acknowledgment JavaScript

I've spent hours debugging this and I'm deploying to production and I've searched everywhere and can't find a clear answer... I'm experiencing a timeout scenario with Google Cloud Pub/Sub while trying to process messages in my Node.js application. Despite configuring the acknowledgment deadline to 30 seconds, some messages are still not acknowledged and result in a 'Message not acknowledged' behavior after timing out. I'm using the `@google-cloud/pubsub` library version 2.18.0. My subscriber is set up like this: ```javascript const { PubSub } = require('@google-cloud/pubsub'); const pubsub = new PubSub(); const subscriptionName = 'my-subscription'; const subscription = pubsub.subscription(subscriptionName); const messageHandler = (message) => { console.log(`Received message: ${message.id}`); // Simulate processing time setTimeout(() => { message.ack(); console.log(`Acknowledged message: ${message.id}`); }, 35000); // Acknowledging after 35 seconds }; subscription.on('message', messageHandler); ``` In this code, I'm intentionally delaying the acknowledgment to simulate a long processing task. However, after 30 seconds, I get the following behavior in my logs: `behavior: Message not acknowledged after timeout`. I've tried increasing the acknowledgment deadline on the subscription, but it doesn't seem to help. This is critical since the messages contain important data that must be processed reliably. What can I do to ensure messages are acknowledged correctly, even if processing takes longer than the initial deadline? The project is a mobile app built with Javascript. Could someone point me to the right documentation? This is part of a larger web app I'm building. What's the correct way to implement this?