[REQUIRED] Please fill in the following fields:

• Unity editor version: 2021.3.16
• Firebase Unity SDK version: 11.1
• Source you installed the SDK: unitypackage (.unitypackage or Unity Package Manager)
• Problematic Firebase Component: Firestore (Auth, Database, etc.)
• Other Firebase Components in use: FirebaseAnalytics, FirebaseAuth, FirebaseCrashlytics, FirebaseDatabase, FirebaseFirestore, FirebaseFunctions, FirebaseMessaging, FirebaseRemoteConfig
• Additional SDKs you are using: play-games-plugin-for-unity-10.14 (Facebook, AdMob, etc.)
• Platform you are using the Unity editor on: Mac (Mac, Windows, or Linux)
• Platform you are targeting: iOS, Android, Issue when running in Editor (iOS, Android, and/or desktop)
• Scripting Runtime: Mono and IL2CPP (Mono, and/or IL2CPP)
• Pre-built SDK from the website or open-source from this repo: prebuilt

[REQUIRED] Please describe the issue here:

It seems it is impossible to run two instances of the same Unity project that use Firestore, on the same computer

Being able to do this is vital for us for developing and debugging multiplayer.

The problem is both instances try to create local database files at the same location.
The path the files are created at is this:
/Users/[user]/Library/Application Support/firestore/__FIRAPP_DEFAULT/[firebase-project-id]/main/LOCK

Since this file is already created by the first instance, the second instance crashes (and crash entire Unity Editor with it)

It would be much better if these files were created in [Unity-Project-Folder]/Temp instead, then it should work fine to run multiple instances of the project

Steps to reproduce:

1. Create a simple Unity App using Firebase Unity SDK, using Firestore.

2. Install ParrelSync in project for easily running multiple copies of the project, or simply copy it to a second folder/check out a second copy.

3. Try start both at the same time.

Have you been able to reproduce this issue with just the Firebase Unity quickstarts (this GitHub project)?

Haven't tried but it should have the same issue if it uses Firestore

What's the issue repro rate? (eg 100%, 1/5 etc)

100%

What happened? How can we make the problem occur?
This could be a description, log/console output, etc.

When launching player in the second editor instance, Unity crashes. This can be found in log:

libc abi: terminating with uncaught exception of type firebase::firestore::FirestoreInternalError: FIRESTORE INTERNAL ASSERTION FAILED: /Users/runner/work/firebase-unity-sdk/firebase-unity-sdk/macos_unity/arm64/bin/external/src/firestore/Firestore/core/src/core/firestore_client.cc(217) void firebase::firestore::core::FirestoreClient::Initialize(const firebase::firestore::credentials::User &, const firebase::firestore::api::Settings &): Failed to open DB: Internal: Failed to open LevelDB database at /Users/olle/Library/Application Support/firestore/__FIRAPP_DEFAULT/touchgrind-x-test/main: LevelDB error: IO error: lock '/Users/olle/Library/Application Support/firestore/__FIRAPP_DEFAULT/touchgrind-x-test/main/LOCK: Resource temporarily unavailable (expected created.ok())

ERROR: FIRESTORE INTERNAL ASSERTION FAILED: /Users/runner/work/firebase-unity-sdk/firebase-unity-sdk/macos_unity/arm64/bin/external/src/firestore/Firestore/core/src/core/firestore_client.cc(217) void firebase::firestore::core::FirestoreClient::Initialize(const firebase::firestore::credentials::User &, const firebase::firestore::api::Settings &): Failed to open DB: Internal:

Failed to open LevelDB database at /Users/olle/Library/Application Support/firestore/__FIRAPP_DEFAULT/touchgrind-x-test/main: LevelDB error: IO error: lock /Users/olle/Library/Application Support/firestore/__FIRAPP_DEFAULT/touchgrind-x-test/main/LOCK: Resource temporarily unavailable (expected created.ok())