[epoxy-paging] Notify Executor crash in PagedListEpoxyController.submitList when used with MvRx

This is a follow on from #567 but specifically when used with MvRx.

I’m seeing sporadic: java.lang.IllegalArgumentException: The notify executor for your PagedList must use the same thread as the model building handler set in PagedListEpoxyController.modelBuildingHandler exceptions when used with MvRx.

I’ve checked the loopers in my Fragment’s invalidate() and Looper.myLooper == Looper.getMainLooper. I’m using the default modelBuildingHandler so I don’t think this is an obvious threading issue

My paging setup is here and my submit is here.

This might be something to do with the fact that MvRx is async all the time. I’ll try and debug this more tomorrow, but figured I’d throw this up here in case anyone is using MvRx + Paging + Epoxy together.

[chrisbanes]

Woops, turns out that I was manually setting defaultModelBuildingHandler 🤦‍♂️ . Thanks for the help!

[elihart]

Ah, glad you figured it out. Any thoughts on how to make it harder to make this mistake?

I think an easy change would be to print out the thread information of both threads when the same thread validation is done.