Mark Duckworth

This is still a bug, please reopen.

@funkyidol, from an [older issue](https://github.com/firebase/firebase-android-sdk/issues/596#issuecomment-528618001), I'm seeing "these NoClassDefFound errors seems to be introduced by pulling in dependencies that somehow conflict with Firestore." Here an example of someone fixing this...

@Farasy, Thanks for posting the fix that worked for you. @Grandpasoul, does the same solution resolve your conflict when using In-App Messaging?

Since this seems to have migrated out of Firestore into more general Firebase Android SDK territory, I'm checking with @VinayGuthal to see if he might have some ideas.

Thanks for bringing this to our attention. We will look into it and follow up with any questions we have.

Wanted to follow up on this. I've looked at your repro and while I don't see the slow down, either on a phone or a laptop, I can understand why...

@MieleVL, thanks for the suggestion. We will consider this change for the SDK.

We decided not to move forward with this change to the public API.

@IvoBiaus, can you update your emulator and let me know if that helps you? A security update was released in 3.5.0 which changed how the SDK authenticates to the back...

@MubashirWaheed, thanks for checking on that. I was getting the same error and then I configured this index - Collection ID = products - Fields Indexed = createdBy Ascending, index ...