[BUG] AppService GetSiteInstances Throws Invalid URI error

Library name and version

Azure.ResourceManager.AppService

Describe the bug

I am trying to get the list of instances from an app services but the SDK is failing when trying to return the list. It throws an Invalid/Empty URI exception.

Additionally, I have tried to get specific instances using known Instance Names, but that also fails with a Null Argument Exception on ‘resourceId’.

Expected behavior

Return list of instances/specific instance

Actual behavior

GetSiteInstances foreach list:

Error: System.UriFormatException: Invalid URI: The URI is empty.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind, UriCreationOptions& creationOptions)
   at System.Uri..ctor(String uriString)
   at Azure.ResourceManager.AppService.WebSiteInstanceStatusData.DeserializeWebSiteInstanceStatusData(JsonElement element)
   at Azure.ResourceManager.AppService.Models.WebAppInstanceStatusCollection.DeserializeWebAppInstanceStatusCollection(JsonElement element)
   at Azure.ResourceManager.AppService.WebAppsRestOperations.ListInstanceIdentifiers(String subscriptionId, String resourceGroupName, String name, CancellationToken cancellationToken)
   at Azure.ResourceManager.AppService.SiteInstanceCollection.<>c__DisplayClass8_0.<GetAll>g__FirstPageFunc|0(Nullable`1 pageSizeHint)
   at Azure.Core.PageableHelpers.FuncPageable`1.AsPages(String continuationToken, Nullable`1 pageSizeHint)+MoveNext()
   at Azure.Pageable`1.GetEnumerator()+MoveNext()
   at Submission#63.<<Initialize>>d__0.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.CodeAnalysis.Scripting.ScriptExecutionState.RunSubmissionsAsync[TResult](ImmutableArray`1 precedingExecutors, Func`2 currentExecutor, StrongBox`1 exceptionHolderOpt, Func`2 catchExceptionOpt, CancellationToken cancellationToken)

GetSiteInstanceAsync error:

Error: System.ArgumentNullException: Value cannot be null. (Parameter 'resourceId')
   at Azure.Core.Argument.AssertNotNullOrEmpty(String value, String name)
   at Azure.Core.ResourceIdentifier..ctor(String resourceId)
   at Azure.ResourceManager.AppService.WebSiteInstanceStatusData.DeserializeWebSiteInstanceStatusData(JsonElement element)
   at Azure.ResourceManager.AppService.WebAppsRestOperations.GetInstanceInfoAsync(String subscriptionId, String resourceGroupName, String name, String instanceId, CancellationToken cancellationToken)
   at Azure.ResourceManager.AppService.SiteInstanceCollection.GetAsync(String instanceId, CancellationToken cancellationToken)
   at Azure.ResourceManager.AppService.WebSiteResource.GetSiteInstanceAsync(String instanceId, CancellationToken cancellationToken)
   at Submission#66.<<Initialize>>d__0.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.CodeAnalysis.Scripting.ScriptExecutionState.RunSubmissionsAsync[TResult](ImmutableArray`1 precedingExecutors, Func`2 currentExecutor, StrongBox`1 exceptionHolderOpt, Func`2 catchExceptionOpt, CancellationToken cancellationToken)

Reproduction Steps

For multiple instances:

var appService = await resourceGroup.Value.GetWebSiteAsync(appServiceName);
var instances = appService.Value.GetSiteInstances();
foreach(var i in instances)
{
    Console.WriteLine($"{i.Data.Name} - {i.Data.State}");
}

Or for a single instance:

var appService = await resourceGroup.Value.GetWebSiteAsync(appServiceName);
var instance = await appService.Value.GetSiteInstanceAsync(instanceName);

Environment

.net 6.0.300

[live1206]

Will be fixed in the next release version

[jsquire]

Hi @orck-adrouin. Unfortunately, my role for this issue is just initial triage. I have no insight into its current state. Updates would need to be provided by the assigned engineer, @ArcturusZhang.

//cc: @xboxeer