SNS-HTTPS subscription with delivery policy always shows up in plan

[aaleksandrov]

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Terraform Version

Terraform v0.12.8
+ provider.aws v2.51.0

But this issue is here for 1+ years

Affected Resource(s)

• aws_sns_topic_subscription

Terraform Configuration Files

terraform {
  required_version = "0.12.8"
}

provider "aws" {
  region  = "eu-west-1"
  version = "~> 2.51.0"
}

resource "aws_sns_topic" "test_sns_topic" {
  name   = "test_sns_topic"
}

resource "aws_sns_topic_subscription" "test_sns_sub" {
  topic_arn              = aws_sns_topic.test_sns_topic.arn
  protocol               = "https"
  endpoint               = "https://some-valid.url"
  endpoint_auto_confirms = true

  delivery_policy = file("${path.module}/delivery_policy.json")
}

delivery_policy.json:

{
  "healthyRetryPolicy": {
    "minDelayTarget": 20,
    "maxDelayTarget": 300,
    "numRetries": 60,
    "numMaxDelayRetries": 0,
    "numNoDelayRetries": 2,
    "numMinDelayRetries": 5,
    "backoffFunction": "exponential"
  },
  "throttlePolicy": {}
}

Debug Output

1st plan https://gist.github.com/aaleksandrov/07f9bcd6f11734d9b163d4be066fd04d
2nd plan https://gist.github.com/aaleksandrov/3d6fba42cd08b96a27ac342e0f8f564c

Expected Behavior

The 2nd plan should have no changes

Actual Behavior

The 2nd plan shows changes

Steps to Reproduce

terraform plan
terraform apply
terraform plan

[mwarkentin]

@aaleksandrov I'm seeing the same. I noticed that if I flattened the JSON in the file to a single line, the changes no longer showed up on the plan. Do you see the same?

[aaleksandrov]

Hi @mwarkentin they don't show up in plan indeed. But if I do some meaningful change in such json (for instance "numMinDelayRetries" : 7) this change doesn't show up either.
So this is not a solution

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!