App shutdown with EXC_RESOURCE, WAKEUPS exception on iOS 8 GM

Question

Does anyone know what this kind of exception is on iOS 8?

=== from crash report ===

Exception Type: EXC_RESOURCE
Exception Subtype: WAKEUPS
Exception Mes         


        

Answer 1

Using Xamarin, we got this issue too. We were using 4 SemaphoreSlim that were waiting at the same time for a too long period of time. Replacing the SemaphoreSlim by an other primitive synchronization (AutoResetEvent in our case to simulate a Semaphore of 1 item) fixed the issue.