Reuben Bond

> [09:59:17 ERR] Exception sending message Request [S10.42.11.253:30000:0 sys.client/hosted-10.42.11.253:11111@104406436]->[ sys.client/04fdcb7e0e654394921a1edc93fb26f9+dddeea0697d6403e9e8f06968cb81cb6] Orlen.Backend.Common.Grains.IUnitGrainObserver.ReceiveAsync(Orleans.Concurrency.Immutable`1[Orlen.Backend.Common.Contexts.ImmutableUnitContext], Orleans.Concurrency.Immutable`1[System.Collections.Generic.IEnumerable`1[Surveily.Common.Entities.AccountData]]) #1840129 to remote endpoint 10.42.11.250:59938 from local endpoint 10.42.11.253:30000 System.InvalidOperationException: Collection was modified; enumeration operation may not execute....

@turowicz I'm looking into this. By the way, is there anything blocking an upgrade to v9.1.2?

I have not been able to reproduce this yet, but while investigating I found another issue related to dropped clients and opened #9463 with a fix

@turowicz Orleans v9.x targets .NET 8 (and .NET 8.0 series dependencies), so you don't need to upgrade other deps. In this regard, it is similar to Aspire, where we don't...

> Yes this happens quite regularly. I will first try to remove the errors with Immutable. Is capturing a crash dump a possibility? I assume you aren't able to reproduce...

@galvesribeiro is this ready for review + merge?

@benjaminpetit PTAL

cc @benjaminpetit PTAL

@galvesribeiro I rebased the PR and added a commit to mark it as alpha for now. We can remove that after. Let me know when you're ready to proceed and...

@galvesribeiro sorry, I merged a PR to convert to .slnx for solutions and now your PR has a conflict. Can you rebase? I think we can get this in.