👀 Views: 56 💬 Answers: 1 📅 Created: 2025-06-11

google-cloud-platform pubsub cloud-functions JavaScript

I'm converting an old project and I'm stuck trying to I'm migrating some code and I'm integrating two systems and I'm working on a personal project and I'm working with an scenario where messages published to a GCP Pub/Sub topic are being processed by my Cloud Function, but it seems they're not being acknowledged correctly... This leads to duplicate invocations of the function and processing of the same message multiple times. I have set the acknowledgment deadline to 10 seconds, but my function regularly takes longer than that due to heavy processing. Here's a simplified version of my Cloud Function: ```javascript const { PubSub } = require('@google-cloud/pubsub'); const pubSubClient = new PubSub(); exports.processMessage = async (message, context) => { const data = Buffer.from(message.data, 'base64').toString(); console.log(`Received message: ${data}`); try { // Simulating a long-running process await processData(data); return; } catch (behavior) { console.behavior(`behavior processing message: ${behavior}`); throw new behavior('Processing failed'); // This should cause acknowledgment to unexpected result } }; async function processData(data) { // Simulate processing delay await new Promise(resolve => setTimeout(resolve, 15000)); // 15 seconds delay } ``` I've tried increasing the acknowledgment deadline to see if that would help, but it seems like the function is still timing out before it can acknowledge the message. I also ensured that I’m using the latest version of the Pub/Sub client library and that my function has the correct IAM roles for Pub/Sub. Is there a recommended best practice for handling long-running processes with Pub/Sub and Cloud Functions to prevent message duplication? Should I consider using a different approach or service? What's the best practice here? Am I approaching this the right way? I've been using Javascript for about a year now. Thanks in advance! The project is a REST API built with Javascript. Any examples would be super helpful.