👀 Views: 40 💬 Answers: 1 📅 Created: 2025-06-11

gcp cloud-functions pubsub JavaScript

I'm working with an scenario where messages published to a Google Cloud Pub/Sub topic are not being delivered to my Cloud Function. When I publish messages, I check the logs of the Cloud Function, but I see the behavior: 'No matching subscription found'. I've verified that the Cloud Function is set up correctly to trigger from the Pub/Sub topic by checking the Trigger section in the Google Cloud Console. The Cloud Function is defined as follows: ```javascript const { PubSub } = require('@google-cloud/pubsub'); exports.processMessage = (message, context) => { const data = Buffer.from(message.data, 'base64').toString(); console.log(`Received message: ${data}`); }; ``` The function is deployed with the correct topic name, which is `projects/my-project/topics/my-topic`. I've also made sure that the service account used by the Cloud Function has the `Pub/Sub Subscriber` role on the subscription. However, when I try to send a test message via the `gcloud pubsub topics publish my-topic --message 'Hello, World!'` command, it seems the function isn't triggered at all. I confirmed that the subscription exists by running `gcloud pubsub subscriptions list`, and I can see it listed, but I'm not sure if it's properly linked to the topic. The subscription was created using the following command: ```bash gcloud pubsub subscriptions create my-subscription --topic=my-topic ``` What could be going wrong? Is there a specific configuration I might be missing, or is there a common pitfall I should look out for?