Error on first execution of 9.1

[afscrome]

Trying out 9.1 preview and hit the following error on my first execution. I have only seen it the first time and haven't been able to reproduce since, so this may not be actionable.

dotnet new install Aspire.ProjectTemplates::9.1.0-* --force 
dotnet new aspire-starter     

And then added the following into the AppHost

var builder = DistributedApplication.CreateBuilder(args);

var apiService = builder.AddProject<Projects.aspire91_ApiService>("apiservice");

var web = builder.AddProject<Projects.aspire91_Web>("webfrontend")
    .WithExternalHttpEndpoints()
    .WithReference(apiService)
    .WaitFor(apiService);

// START ADDITION
web.WithHttpHealthCheck();
// END ADDITION

builder.Build().Run();

On start up, the app failed with the following errors.

info: Aspire.Hosting.DistributedApplication[0]
      Login to the dashboard at https://localhost:17015/login?t=0f93f7cf12e2638c9a945a896c9f5740
info: Aspire.Hosting.DistributedApplication[0]
      Distributed application started. Press Ctrl+C to shut down.
fail: Aspire.Hosting.Dcp.dcpctrl.ExecutableReconciler[0]
      could not perform substitution for environment variable ASPNETCORE_URLS'  {"Executable": {"name":"webfrontend-frbcgszp"}, "Reconciliation": 9, "Input": "https://localhost:{{- portForServing \"webfrontend-https\" -}};http://localhost:{{- portForServing \"webfrontend-http\" -}}", "error": "template: envar:1:82: executing \"envar\" at <portForServing \"webfrontend-http\">: error calling portForServing: service '/webfrontend-http' referenced by executable '/webfrontend-frbcgszp' specification does not exist"}
fail: Aspire.Hosting.Dcp.dcpctrl.ExecutableReconciler[0]
      could not create Endpoint object  {"Executable": {"name":"webfrontend-frbcgszp"}, "Reconciliation": 11, "ServiceName": "webfrontend-http", "Workload": "/webfrontend-frbcgszp", "error": "service-producer annotation is invalid: missing information about the port to expose the service"}
fail: Aspire.Hosting.Dcp.dcpctrl.ExecutableReconciler[0]
      could not create Endpoint object  {"Executable": {"name":"webfrontend-frbcgszp"}, "Reconciliation": 12, "ServiceName": "webfrontend-http", "Workload": "/webfrontend-frbcgszp", "error": "service-producer annotation is invalid: missing information about the port to expose the service"}
fail: Aspire.Hosting.Dcp.dcpctrl.ExecutableReconciler[0]
      could not create Endpoint object  {"Executable": {"name":"webfrontend-frbcgszp"}, "Reconciliation": 13, "ServiceName": "webfrontend-http", "Workload": "/webfrontend-frbcgszp", "error": "service-producer annotation is invalid: missing information about the port to expose the service"}
fail: Aspire.Hosting.Dcp.dcpctrl.ExecutableReconciler[0]
      could not create Endpoint object  {"Executable": {"name":"webfrontend-frbcgszp"}, "Reconciliation": 14, "ServiceName": "webfrontend-http", "Workload": "/webfrontend-frbcgszp", "error": "service-producer annotation is invalid: missing information about the port to expose the service"}
fail: Aspire.Hosting.Dcp.dcpctrl.ExecutableReconciler[0]
      could not create Endpoint object  {"Executable": {"name":"webfrontend-frbcgszp"}, "Reconciliation": 17, "ServiceName": "webfrontend-http", "Workload": "/webfrontend-frbcgszp", "error": "service-producer annotation is invalid: missing information about the port to expose the service"}

Versions:

  <Sdk Name="Aspire.AppHost.Sdk" Version="9.1.0-preview.1.25111.2" />
  <PackageReference Include="Aspire.Hosting.AppHost" Version="9.1.0-preview.1.25111.2" />

[davidfowl]

cc @karolz-ms @danegsta

[karolz-ms]

We might have a timing issue here. In typical Aspire app startup sequence Executables are created shortly after Services and the caches used by the internal (controller) client might need a bit of time to catch up. A couple of short-time retries should eliminate this failure mode.

[danmoseley]

@karolz-ms do we need those retries in 9.1?

[mitchdenny]

Is it possible that this is a timing issue where a previous instance of DCP was running (old 9.0 version) but the AppModel is trying to use annotations which are only in 9.1?

[karolz-ms]

@danmoseley I do not think so, this should be rare

@mitchdenny I do not think so either. I mean the service-producer annotation is invalid errors in the log are unrelated to the first error that complains about inability to do environment value variable substitution. The variable substitution mechanism did not change between 9.0 and 9.1.

[dbreshears]

@danmoseley. Going to move this to 9.2