Rewind is not supported in Isolated mode

[Michson07]

Hi!
I migrated azure durable functions from inProcess to Isolated mode recently.
I used "Rewind" option several times and I just noticed that this option is no longer supported in isolated mode (I am using version 6.5.0-beta2).
What was the decision behind it? Is it going to be implemented?
It's quite important feature, especially when the bug is fixed and you want to continue an existing instance.

[scale-tone]

@Michson07 , "Rewind" is a feature that has always been in preview.

In Isolated mode the DurableTaskClient simply does not have such a method, so there's no way for DfMon to support it.

To check the work state on that feature, I believe, you can follow this thread on the DurableTask repo.

[michal-czajkowski]

@scale-tone do you have any updates on this? I see there’s no reply in the discussion you mentioned, but perhaps you’ve found a workaround.

[epDugas]

Just to surface, rewind was "recently" added in isolated (https://github.com/microsoft/durabletask-dotnet/releases/tag/v1.17.0). @scale-tone - if I get your blessing to update the dependency, I will attempt to implement.

[scale-tone]

That would be really great, @epDugas ! Thanks again!

[Michson07]

@epDugas When are you planning to update this? Let me know if you need any help!

[epDugas]

Apologies for the delayed response. Commented on @Michson07 #315.

[Michson07]

@scale-tone I’ve created a pull request with an improvement. When you have a moment, could you please take a look?
If the change looks good, it would be great if a new package version could be published as well.
Thanks a lot for your time and work on this project!

#315

[Michson07]

@scale-tone Great, thanks! Do you know approximately when the new version will be released?

[scale-tone]

Looks like bumping up Microsoft.Azure.Functions.Worker.Extensions.DurableTask also requires bumping up Microsoft.Azure.Functions.Worker to 2.51.0 (as @epDugas correctly pointed out in the PR comments).

Otherwise I'm getting strange errors:

[2026-04-17T14:19:08.674Z] Executed 'Functions.DfmServeStaticsFunction' (Failed, Id=e507f531-06e4-4d01-821a-21bab9010561, Duration=201ms)
[2026-04-17T14:19:08.683Z] System.Private.CoreLib: Exception while executing function: Functions.DfmServeStaticsFunction. System.Private.CoreLib: Result: Failure
Exception: Method not found: 'Void Microsoft.Azure.Functions.Worker.DefaultTraceContext..ctor(System.String, System.String)'.
Stack:    at Microsoft.Azure.Functions.Worker.Grpc.GrpcFunctionInvocation..ctor(InvocationRequest invocationRequest)
[2026-04-17T14:19:08.692Z]    at Microsoft.Azure.Functions.Worker.Handlers.InvocationHandler.InvokeAsync(InvocationRequest request) in /_/src/DotNetWorker.Grpc/Handlers/InvocationHandler.cs:line 75.

Will bump them up shortly...

[scale-tone]

Pushed v6.8.0-beta1. Can you folks check if anything's missing?

[epDugas]

Package bumps look good. I pulled the beta, and attempted a Rewind, and the operation submission worked, but unfortunately I don't have any orchestrations to verify on, because rewind doesn't support orchestrations with Durable Timers :(.

[Michson07]

Pushed v6.8.0-beta1. Can you folks check if anything's missing?

I just checked and Rewind works perfectly

[scale-tone]

Released v6.8.1 with support for this.
Thanks again, everyone!