Crash on sideloaded Android build when no internet connection available

This happens with 100% reproducibility under the following conditions:

• Using Unity 2017.2.1 (haven’t tested other versions)
• Performance Reporting is enabled in the Services tab
• Mono scripting backend is used (does not occur with IL2CPP builds)
• Failure delegates are set in the AdjustConfig (I believe it only needs to be the session failure delegate)

Steps:

1. Set up an Android project with Adjust in Unity
2. Sign into your Unity account in the project and enable Performance Reporting in the Services window
3. Ensure that Scripting Backend is set to Mono in Player Settings -> Android -> Other Settings
4. Ensure that failure delegates are set in AdjustConfig (no-op callbacks are fine; I just logged const strings)
5. Ensure that Adjust.start is called somewhere with said AdjustConfig instance
6. Ensure that Adjust.trackEvent is called after Adjust initializes
7. Make a build (internal build system, not development build; not sure if it matters)
8. Sideload .apk using adb install
9. Enable airplane mode on device such that there is no internet connection
10. Observe crash or hang after Adjust initializes

It seems that the problem is in this block of code in onFinishedSessionTrackingFailed: https://github.com/adjust/unity_sdk/blob/c11432cfb6a161efbeadc3d4dfbe5881ce87d817/Assets/Adjust/Android/AdjustAndroid.cs#L594-L603

I think the ajoJsonResponse is null (since there’s no response). It’s crashing despite the try/catch block.

[zvinless]

Hm, I can no longer reproduce after disabling and re-enabling Performance Reporting–I can let you know when I have more info.

[uerceg]

@zvinless

We have released an update of Adjust Unity SDK v4.12.4 which should address this issue: https://github.com/adjust/unity_sdk/releases/tag/v4.12.4

Feel free to reopen the issue in case you still encounter this issue with v4.12.4++.

Thank you one more time for reporting the issue.

Cheers!