How to handle exceptions in OnNext when using ObserveOn?

Question

My application terminates when an error is thrown in OnNext by an observer when I use ObserveOn(Scheduler.ThreadPool). The only way I have found to

Answer 1

We're addressing this issue in Rx v2.0, starting with the RC release. You can read all about it on our blog at http://blogs.msdn.com/rxteam. It basically boils down to more disciplined error handling in the pipeline itself, combined with a SubscribeSafe extension method (to redirect errors during subscription into the OnError channel), and a Catch extension method on IScheduler (to wrap a scheduler with exception handling logic around scheduled actions).

Concerning the ExceptionToError method proposed here, it has one flaw. The IDisposable subscription object can still be null when the callbacks run; there's a fundamental race condition. To work around this, you'd have to use a SingleAssignmentDisposable.