azuread_group ID: does not become available when creating multiple groups simultaneously (intermittent).

[TonyLunt]

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Description

When creating multiple AD Groups simultaneously, there are intermittent errors where the "id" property does not become available on the resource. This is easiest to reproduce when AD Groups are created within a module.

I'm currently working around this by adding dependencies to throttle the AD group creation, but this appears to be an issue unless I'm missing something.

Terraform (and AzureAD Provider) Version

Terraform v0.11.13
provider.azuread v0.2.0

Affected Resource(s)

• azuread_group

Terraform Configuration Files

##module/main.tf
variable "name" {}

resource "azuread_group" "one" {
  name = "foo-${var.name}1"
}

resource "azuread_group" "two" {
  name = "foo-${var.name}2"
}

resource "null_resource" "echo" {
  provisioner "local-exec" {
    command = "echo ${azuread_group.one.id} ${azuread_group.two.id}",
  }
}

##main.tf
module "bob" {
     source = "module"
     name   = "bob"
}

module "tom" {
    source = "module"
    name   = "tom"
}

module "frank" {
    source = "module"
    name   = "frank"
}

module "larry" {
    source = "module"
    name   = "larry"
}

Debug Output

https://gist.github.com/TonyLunt/9f30ebf4cbdd4c835c4757d9548b48d5

Expected Behavior

Two AD groups created for each instance of the module.

Actual Behavior

Intermittently errors on some AD Groups with an error of:
Resource 'azuread_group.two' does not have attribute 'id' for variable 'azuread_group.two.id'
or
Resource 'azuread_group.one' does not have attribute 'id' for variable 'azuread_group.one.id'.

Errors begin to appear when creating 8+ AD Groups simultaneously.

Steps to Reproduce

1. Create an empty directory
2. Place the module code above into /module/main.tf
3. Place the main.tf code at the root directory
4. terraform init
5. terraform apply

[ghost]

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