1.7-Android crashes on start and periodically in Background

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• Bug is not mentioned in the FAQ
• Bug is specific for Android only, for general issues / questions that apply to iOS and Android please raise them in the documentation repository
• Bug is not already reported in another issue

Describe the bug

A friend’s Samsung Galaxy A3 Mini updated CWA to 1.7 11 hours ago. Ever since the app crashes on open and every few seconds when in background.

11-26 10:02:20.493  5987  6021 E AndroidRuntime: FATAL EXCEPTION: pool-2-thread-3
11-26 10:02:20.493  5987  6021 E AndroidRuntime: Process: de.rki.coronawarnapp, PID: 5987
11-26 10:02:20.493  5987  6021 E AndroidRuntime: java.lang.IllegalArgumentException: Unknown worker: androidx.work.impl.workers.ConstraintTrackingWorker
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at de.rki.coronawarnapp.util.worker.CWAWorkerFactory.createWorker(CWAWorkerFactory.kt:7)
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at androidx.work.WorkerFactory.createWorkerWithDefaultFallback(WorkerFactory.java:1)
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at androidx.work.impl.WorkerWrapper.run(WorkerWrapper.java:70)
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at androidx.work.impl.utils.SerialExecutor$Task.run(SerialExecutor.java:1)
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
11-26 10:02:20.493  5987  6021 E AndroidRuntime: 	at java.lang.Thread.run(Thread.java:762)

Technical details

• Mobile device: Samsung Galaxy A3 Mini (2016), SM-A310F
• Android version: 7.0

Possible Fix

Additional context

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Internal Tracking ID: EXPOSUREAPP-3987

[HilRick5]

@d4rken Yes, I guess I can confirm that. In order to get rid off the cwa crashes I recently hoped that a system update would help. Which obviously did not work out. I used a flashtool from Mediatek for that. The device was recognized as MT6580. More specifically the path to one of the files was named “X511_CQ_7081C_CUBOT_N_V.0.2.0.1.S00708\MT6580”. Thanks for looking into this. Let me know if I could provide anything else useful. BTW: When I use the function “send feedback” when the app crashes. Will that end up in the Nirvana of Google or is it something that you developers have access to ?

[rsudev]

I was affected by this issue as well (Android 7.1, even though I had 4GB of internal memory free) and can confirm that it is fixed for me with the just published update to 1.7.1. Thanks for the quick fix!