[Docs]: Default kinesis_firehose_delivery_stream parameter values have changed in AWS

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Documentation Link

https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/kinesis_firehose_delivery_stream.html#parameters

Description

The parameters block within kinesis_firehose_delivery_stream has a known quirk where state is not stored if the parameter_value is the same as the current AWS default. We recently encountered this issue again, where the state for the firehose stream parameters did not keep in Terraform:

# xxx.aws_kinesis_firehose_delivery_stream.firehose will be updated in-place
resource "aws_kinesis_firehose_delivery_stream" "firehose" {
--
  | id             = "arn:aws:firehose:*:*:deliverystream/xx"
  | name           = "xx"
  | tags           = {
  | "PreventDestroy" = "true"
  | "env"            = "development"
  | }
  | # (5 unchanged attributes hidden)
  |  
  | ~ extended_s3_configuration {
  | # (8 unchanged attributes hidden)
  |  
  | ~ processing_configuration {
  | # (1 unchanged attribute hidden)
  |  
  | ~ processors {
  | # (1 unchanged attribute hidden)
  |  
  | - parameters {
  | - parameter_name  = "BufferSizeInMBs" -> null
  | - parameter_value = "1" -> null
  | }
  |  
  | # (1 unchanged block hidden)
  | }
  | }
# ...

Knowing about the existing open issue #9827, we checked AWS for changes and the console showed us that creating a new firehose with "Transform and convert records" setting sets the value to 1mb instead of the previous default of 3. The API reference for firehose confirmed this is there new default.

The parameters array object setting in the kinesis_firehose_delivery_stream documentation requires updating to reflect this backend change that affects the known perpetual state issue with firehoses.

References

Relates #9827.
Relates #19936.

AWS API Reference for Firehose parameters block: https://docs.aws.amazon.com/firehose/latest/APIReference/API_ProcessorParameter.html

Would you like to implement a fix?

None

[github-actions]

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[github-actions]

This functionality has been released in v5.32.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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