Terraform fails to identify missing sns subscriptions

[MartinMeinhold]

See #4888 for the original case which only addressed the aws_sns_topic resources but not the aws_sns_topic_subscription one. I can see the related PR #4891 updated aws_sns_topic but didn't touch the subscriptions.

Terraform Version

Terraform v0.6.16

Affected Resources

• aws_sns_topic_subscription

Terraform Configuration Files

resource "aws_sns_topic" "testme" {
    name     = "testme"
    provider = "aws.us_east_1"
}

resource "aws_sns_topic_subscription" "testme" {
    topic_arn = "${aws_sns_topic.testme.arn}"
    protocol  = "lambda"
    endpoint  = "${aws_lambda_function.somefunction.arn}"
    provider  = "aws.us_east_1"
}

Expected Behavior

Terraform would translate the NotFound response code to a missing resource and try to create it.

Actual Behavior

Terraform bails out in planning mode with an unexpected error.

Steps to Reproduce

1. Create a configuration with a aws_sns_topic and a aws_sns_topic_subscription and create an execution plan
2. Apply the execution plan; terraform will create the sns topic and the subscription
3. Delete subscription manually (e.g. via the Amazon Console or via the CLI)
4. Create a new execution plan; terraform should discover the previously created subscription has been deleted ...

... but instead it bails out with

* aws_sns_topic_subscription.testme: NotFound: Subscription does not exist
    status code: 404, request id: a22e7ed7-3630-5a8a-b767-317ac1440e24

References

• Fails to refresh state SNS subscription deletions #4888

[stack72]

Hi @MartinMeinhold

apologies for not picking this up in the first fix - I have just opened another PR which fixes the issue in the topic subscription this time

Paul

[MartinMeinhold]

No worries, all good. Thanks for the quick response.

[ghost]

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