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Fix encoding of entity unlock events #462

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halspang merged 2 commits into from
Nov 12, 2025
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Fix encoding of entity unlock events #462

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3eae08c
fix incorrect conversion of entity event, causing nondeterminism fail…
sebastianburckhardt Aug 26, 2025
4c98993
Merge branch 'main' into sburckha/fix-entity-unlock
halspang Nov 11, 2025
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2 changes: 1 addition & 1 deletion src/Shared/Grpc/EntityConversions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -138,7 +138,7 @@ public static DTCore.History.HistoryEvent EncodeUnlockSent(
OrchestrationInstance? instance)
{
P.EntityUnlockSentEvent unlockSentEvent = protoEvent.EntityUnlockSent;
string name = EncodeEventName(null);
string name = "release";

@halspang halspang Oct 22, 2025

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I trust that this is correct, but can we get context on it? It seems the other encodes use the same EncodeEventName, why is this one different?

If this has always been wrong, can we also get a test for this path that shows it is working? Or is there already a test that has traditionally been flaky and we haven't investigated it?

@sophiatev sophiatev Nov 5, 2025

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I think maybe this PR adds the tests

@sebastianburckhardt sebastianburckhardt Nov 5, 2025

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I think maybe this PR adds the tests

Yes, specifically the test in TwoCriticalSections.cs

@sebastianburckhardt sebastianburckhardt Nov 5, 2025

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I trust that this is correct, but can we get context on it?

The event name must be encoded the same way as it is decoded on line

durabletask-dotnet/src/Shared/Grpc/EntityConversions.cs

Line 299 in 65bbff1

else if (name == "release")
.

The format we use here to encode entity messages as events is the same as in DurableTask.Core (for example, event names are defined in
https://github.com/Azure/durabletask/blob/main/src/DurableTask.Core/Entities/EventFormat/EntityMessageEventNames.cs) but it is not technically required to be the same and we do not want to introduce a dependency on the latter, so the class EntityConversions.cs is designed to be self-contained, and now, hopefully, self-consistent.

string input = JsonConvert.SerializeObject(
new ReleaseMessage()
{
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