FIRESTORE (8.2.1) INTERNAL ASSERTION FAILED: Unexpected state
Problem
We're seeing this error a lot in sentry atm. I can not reproduce this or say where it comes from or what it consequences are. I guess it is related to offline support.
Error Output
error a lot in sentry atm.
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1 Fix
Implement Firestore Offline Persistence Configuration
The 'INTERNAL ASSERTION FAILED: Unexpected state' error in Firestore is often related to issues with offline persistence. This can occur when the Firestore SDK is not properly configured to handle offline data or when there are unexpected interactions between online and offline states. This can lead to inconsistencies in the local cache and the server state, causing assertions to fail.
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- 1
Enable Offline Persistence
Ensure that offline persistence is enabled in your Firestore configuration. This allows Firestore to cache data locally and manage offline states more effectively.
javascriptfirebase.firestore().enablePersistence() - 2
Handle Persistence Errors
Implement error handling for persistence-related issues. This will help catch and log any errors that occur when enabling persistence, providing more context for debugging.
javascriptfirebase.firestore().enablePersistence().catch((err) => { console.error('Persistence failed:', err); }); - 3
Update Firestore SDK
Make sure you are using the latest version of the Firestore SDK. Updates often include bug fixes and improvements related to offline support.
bashnpm install firebase@latest - 4
Monitor Offline Behavior
Add logging to monitor the behavior of your application when offline. This can help identify patterns or specific actions that lead to the assertion failure.
javascriptwindow.addEventListener('offline', () => { console.log('App is offline'); }); window.addEventListener('online', () => { console.log('App is online'); }); - 5
Test with Different Network Conditions
Simulate various network conditions to test how your application behaves when transitioning between online and offline states. This can help reproduce the issue and identify specific triggers.
noneUse Chrome DevTools to simulate offline mode.
Validation
To confirm the fix worked, monitor Sentry for the 'INTERNAL ASSERTION FAILED: Unexpected state' error after implementing these changes. Additionally, test the application in offline mode to ensure data is being cached and synchronized correctly without errors.
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Environment
Submitted by
Alex Chen
2450 rep