Auth from shared keychain causing problems to connect to firestore

[moopoints]

[REQUIRED] Step 2: Describe your environment

• Xcode version: 10.2.1
• Firebase SDK version: 6.2.0
• Firebase Component: Core/Auth
• Component version: 6.2.0

[REQUIRED] Step 3: Describe the problem

I implemented the newly added cross-app auth with share ios keychain following the instructions here (https://firebase.google.com/docs/auth/ios/single-sign-on). Initially auth as well as the usage of listeners and cloud functions are working just fine, but then after a while (both on the simulator as well as actual devices), the connection cannot be created anymore. It's unclear to me whether this is caused by using users from shared access groups or simply a recent update to the firebase sdk.

Steps to reproduce:

I have had a hard time to identify any correlating factors or immediate ways to reproduce this but will report back if I do. So far it looks like this is triggered by time (possibly auth tokens aren't renewing properly after an hour?). The error message is below. The error message appears even though the device/simulator definitely have internet connectivity. When this happens I still have access to the current user from Auth.

Restarting the app won't fix this. Only signing out entirely and signing back in allows for a connection to be made again. I am using only google auth in this case. The error message is this:

6.2.0 - [Firebase/Firestore][I-FST000001] Could not reach Cloud Firestore backend. Connection failed 1 times. Most recent error: An internal error has occurred, print and inspect the error details for more information.
This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

[morganchen12]

@moopoints, can you print the full error object and share the detailed description here?

[moopoints]

I'm not sure how I can get a full error object.

Here is the entire print from the log:

2019-06-13 13:10:14.939424-0400 app-name[4777:3498470] 6.2.0 - [Firebase/Firestore][I-FST000001] Could not reach Cloud Firestore backend. Connection failed 1 times. Most recent error: An internal error has occurred, print and inspect the error details for more information.
This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

At this point I can reproduce this error reliably and conclude that it's triggered by time. Immediately after auth all functions work just fine and I have access to the firestore backend. After roughly an hour the app isn't able to connect anymore, even though a connectivity surely exists.

[morganchen12]

In your snapshot listener, do you receive an error object when this happens?

[moopoints]

Nope, my listeners all return snapshots successfully. However they are missing the most recent items, indicating that they are fetching against the local cache.

[moopoints]

Any further assistance with this? I can predictably reproduce this: the first hour I have a connection to Firestore with the shared access group user. After an hour no connection can be established anymore. Should I revert to the default auth and wait for this feature to move out of beta?

[morganchen12]

For the time being, yes. We'll update this ticket when we find a workaround or solution.

[morganchen12]

@moopoints, can you share your project or a sample that reproduces this issue?

[moopoints]

I'm sorry, I wish I could share the project. Do you possibly have a sample project that has a working implementation?

[morganchen12]

You can try reproing using the Firestore quickstart, though it doesn't use a shared keychain.

[moopoints]

This turns out to be a more general problem with auth. I reverted my code to the default auth (using GDSignin) and am not using shared keychain users anymore. I still have the same issue: auth and connection work perfectly fine for the first hour after signing in. Then I can't make any connection to firebase anymore. This has been an issue since I updated to 6.2.0 (I was previously on 5.x). I just updated to 6.3.0 and am unfortunately still experiencing the same issue. What's a good way to trouble shoot this? Error code below:

6.3.0 - [Firebase/Firestore][I-FST000001] Could not reach Cloud Firestore backend. Connection failed 1 times. Most recent error: An internal error has occurred, print and inspect the error details for more information.
This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.