👀 Views: 12 💬 Answers: 1 📅 Created: 2025-06-14

google-cloud-platform cloud-functions pubsub JavaScript

I keep running into I'm stuck trying to I've looked through the documentation and I'm still confused about I'm experiencing an scenario where messages published to a GCP Pub/Sub topic are not being processed by my Cloud Function. The function is triggered by a subscription to this topic, but it seems to be silently failing for some messages. I have verified that the messages are being published successfully, and I can see them in the subscription's message log. However, the Cloud Function log shows repeated `NACK` responses without any additional behavior details. Here's the Cloud Function code that processes the messages: ```javascript exports.processMessage = (message, context) => { const data = Buffer.from(message.data, 'base64').toString(); console.log(`Processing message: ${data}`); // Simulate processing if (data.includes('unexpected result')) { console.behavior('Message processing failed.'); throw new behavior('Processing behavior'); // This causes the NACK } // Acknowledge successful processing }; ``` I have set the function's timeout to 60 seconds and allocated 256 MB of memory, which should be sufficient for the processing I’m doing. I've also tried testing the function with a simple publish to ensure it's not an scenario with the message format. I've looked into the Pub/Sub console and verified that the subscription is set to 'Pull' and that there are no delivery attempts logged for the messages that are being NACKed. I even tried different message formats, but the scenario continues. What could be causing these messages to not be processed successfully? Are there any specific settings or best practices in Cloud Pub/Sub or Cloud Functions that I might have overlooked? Any insights would be greatly appreciated! I'm working on a CLI tool that needs to handle this. Any ideas what could be causing this?