updating azurerm_app_configuration_feature fails with error when not using labels.

[fgroen]

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Terraform Version

1.3.5

AzureRM Provider Version

3.37.0

Affected Resource(s)/Data Source(s)

azurerm_app_configuration_feature

Terraform Configuration Files

data "azurerm_client_config" "current" {}

resource "azurerm_role_assignment" "appconf_dataowner" {
  scope                = var.resource_group_id
  role_definition_name = "App Configuration Data Owner"
  principal_id         = data.azurerm_client_config.current.object_id
}

resource "azurerm_app_configuration" "appconfig" {
  name                = "appconf-fred"
  resource_group_name = var.resource_group_name
  location            = var.resource_group_location
  sku                 = "standard"
  tags                = var.tags
}

resource "azurerm_app_configuration_feature" "feature_toggle" {
  configuration_store_id = azurerm_app_configuration.appconfig.id
  name                   = "test"
  description            = "My feature"
  enabled                = true
}


To reproduce the error, change the feature toggle into something like:

resource "azurerm_app_configuration_feature" "feature_toggle" {
  configuration_store_id = azurerm_app_configuration.appconfig.id
  name                   = "test"
  description            = "My feature"
  enabled                = false
}

Debug Output/Panic Output

module.appconfiguration[0].azurerm_app_configuration_feature.feature_toggle: Modifying... [id=/subscriptions/XXXX/resourceGroups/rg-XXX/providers/Microsoft.AppConfiguration/configurationStores/appconf-fred/AppConfigurationFeature/test/Label/%00]
╷
│ Error: while unlocking key/label pair test/%00: appconfiguration.BaseClient#DeleteLock: Failure responding to request: StatusCode=404 -- Original Error: autorest/azure: error response cannot be parsed: {"" '\x00' '\x00'} error: EOF
│
│   with module.appconfiguration[0].azurerm_app_configuration_feature.feature_toggle,
│   on appconfig\main.tf line 55, in resource "azurerm_app_configuration_feature" "feature_toggle":
│   55: resource "azurerm_app_configuration_feature" "feature_toggle" {
│
│ while unlocking key/label pair test/%00: appconfiguration.BaseClient#DeleteLock: Failure responding to request: StatusCode=404 -- Original Error: autorest/azure: error response cannot be 
│ parsed: {"" '\x00' '\x00'} error: EOF

Expected Behaviour

A successful terraform apply, being able to change existing features without a label.

Actual Behaviour

When creating a feature without a label gives this output after apply (note the %00):

module.appconfiguration[0].azurerm_app_configuration_feature.feature_toggle: Creating...
module.appconfiguration[0].azurerm_app_configuration_feature.feature_toggle: Creation complete after 1s [id=/subscriptions/XXXX/resourceGroups/rg-XXX/providers/Microsoft.AppConfiguration/configurationStores/appconf-fred/AppConfigurationFeature/test/Label/%00]

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

When trying to change that feature the plan with give this output:

Terraform will perform the following actions:

  # module.appconfiguration[0].azurerm_app_configuration_feature.feature_toggle will be updated in-place
  ~ resource "azurerm_app_configuration_feature" "feature_toggle" {
      ~ enabled                 = true -> false
        id                      = "/subscriptions/XXXX/resourceGroups/rg-XXX/providers/Microsoft.AppConfiguration/configurationStores/appconf-fred/AppConfigurationFeature/test/Label/%00"
        name                    = "test"
        tags                    = {}
        # (4 unchanged attributes hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

When running the apply we get the error described above.

When I provide a label, I can change the features.

Steps to Reproduce

2. change the feature (toggle enable state for example)
3. terraform apply (produces the error)
4. now add a label to the feature, (re)create it and try to change it, this all works

Important Factoids

No response

References

Might be related to the changes done for #19437 ?

[prahlad141992]

Also, unable to delete features flag with azurerm provider version 3.37.0
Plan: 0 to add, 0 to change, 1 to destroy.
module.aacFeature.azurerm_app_configuration_feature.aacFeature["Broker.CompanyUI"]: Destroying... [id=/subscriptions/XXXXXXXXXXXX/resourceGroups/XXXXX/providers/Microsoft.AppConfiguration/configurationStores/XXXXX/AppConfigurationFeature/XXXX/Label/%00]
module.aacFeature.azurerm_app_configuration_feature.aacFeature["feature1"]: Destruction complete after 0s

apply is success but it is not deleted features from app configuration stores

[fgroen]

Thank you for the quick response !

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