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GCP Cloud Functions timing out on Firestore triggers despite short execution time

šŸ‘€ Views: 82 šŸ’¬ Answers: 1 šŸ“… Created: 2025-06-08
google-cloud-functions firestore cloud-functions firebase JavaScript

I'm getting frustrated with I've looked through the documentation and I'm still confused about I've set up a Cloud Function that triggers on Firestore document updates, but I'm working with a timeout scenario... The function is supposed to run a simple update operation, yet I'm getting the behavior `Function execution took too long. The maximum execution time is 540 seconds.` even though the operation should take less than 5 seconds to complete. Here's the relevant code snippet: ```javascript const functions = require('firebase-functions'); const admin = require('firebase-admin'); admin.initializeApp(); exports.updateUserData = functions.firestore.document('users/{userId}') .onUpdate(async (change, context) => { const newData = change.after.data(); const userId = context.params.userId; // Simulate a simple update operation return admin.firestore().collection('users').doc(userId).update({ lastUpdated: admin.firestore.FieldValue.serverTimestamp() }); }); ``` I've ensured that there are no infinite loops or excessive processing in my function. The Firestore document being updated contains a moderate amount of data (around 5KB), and I'm using Firestore's default settings for my database. I also checked the Google Cloud Console logs, but I didn't find anything that indicated what might be causing the timeout. I've tried increasing the timeout limit in the function settings, but that doesn't seem to help. Could this be related to the way Firestore handles triggers? Is there something I’m missing in how Cloud Functions interacts with Firestore that could lead to these timeouts? Thanks in advance! The stack includes Javascript and several other technologies. Is there a better approach? For context: I'm using Javascript on Linux. Thanks, I really appreciate it!