While creating a new SNS Topic resource, the sqs_success_feedback_sample_rate is not set as 0%. The value of 0 is set as NaN.

If we set any other value other than zero, then the provided value is set correctly. This behavior is happening when creating the Topic. If we update sqs_success_feedback_sample_rate (from 5% to 0%) then 0 is set correctly.

Terraform Version

• Terraform v0.12.16
• • provider.aws v2.41.0

Affected Resource(s)

• aws_sns_topic

Terraform Configuration Files

resource "aws_sns_topic" "topic" {
  name                             = topic_name
  sqs_success_feedback_sample_rate = "0"
  sqs_success_feedback_role_arn    = sns_delivery_success_feedback_role.arn
  sqs_failure_feedback_role_arn    = sns_delivery_failure_feedback_role.arn
}

Expected Behavior

sqs_success_feedback_sample_rate should be set correctly.
Success sample rate should be set as 0 or whatever the value (between 0 and 100) being passed in the configuration.

Actual Behavior

It appears 0 success sample rate is not able to set.

In terraform plan it shows the correct value but after terraform apply it sets as NaN.

Steps to Reproduce

1. Create an SNS Topic with SNS Delivery logging. Set sqs_success_feedback_sample_rate as 0
2. terraform plan/apply
3. View the created SNS Topic in the console and in the Delivery Status Logging section, the Success sample rate is showing as NaN.

References

• https://www.terraform.io/docs/providers/aws/r/sns_topic.html
• https://registry.terraform.io/modules/terraform-aws-modules/sns/aws/2.1.0
• https://github.com/terraform-aws-modules/terraform-aws-sns/tree/v2.1.0