GCP Cloud Functions Timing Out When Accessing Firestore - 'Deadline Exceeded' Error
I'm experiencing a frustrating issue with my Google Cloud Function that interacts with Firestore. The function is supposed to trigger upon receiving a Pub/Sub message, process some data, and then update Firestore. However, I'm getting a 'Deadline Exceeded' error, which suggests that my function is timing out before it can complete the Firestore update. Here’s the relevant portion of my code: ```javascript const functions = require('firebase-functions'); const admin = require('firebase-admin'); admin.initializeApp(); exports.processMessage = functions.pubsub.topic('my-topic').onPublish(async (message) => { const data = message.json; try { // Simulated processing time await new Promise((resolve) => setTimeout(resolve, 8000)); // Simulating 8 seconds of processing await admin.firestore().collection('my-collection').doc(data.id).set(data); console.log('Document written successfully'); } catch (error) { console.error('Error writing document:', error); throw new functions.https.HttpsError('internal', 'Error writing to Firestore'); } }); ``` The default timeout for Cloud Functions is set to 60 seconds, so I know I’m within that limit. However, I suspect that the issue is related to asynchronous operations, particularly the Firestore write. I’ve confirmed that Firestore is set up correctly and that the service account has appropriate permissions in the IAM settings. As a test, I removed the Firestore write operation and simply returned a success message after the simulated processing, and that worked fine. This leads me to believe that the Firestore call is the bottleneck. I also tried optimizing my Firestore database structure but didn’t see any significant improvement. Is there a way to ensure that the Firestore operation completes successfully without timing out? Should I be handling this differently, perhaps by batching requests or adjusting the way I’m managing promises? Any insights or suggestions would be greatly appreciated! Any ideas what could be causing this?