EMR instance gets "forces new instance" when no changes made

[synhershko]

Code to launch the EMR cluster:

resource "aws_emr_cluster" "parqueting" {
  name          = "Parqueting"
  release_label = "emr-5.14.0"
  applications  = ["Spark", "Ganglia"]

  log_uri = "s3n://my-emr-logs/parqueting/"

  ec2_attributes {
    subnet_id                         = "${var.subnet_id}"
    instance_profile                  = "${aws_iam_instance_profile.emr_profile.arn}"
    key_name                          = "${var.keyname}"
  }

  configurations = "emr-parqueting-configurations.json"

  master_instance_type  = "m4.large"
  core_instance_type    = "c4.2xlarge"
  core_instance_count   = 1

  tags {
    name     = "parqueting"
  }
  service_role = "${aws_iam_role.iam_emr_service_role.arn}"
}

After creation, whenever I try to change other things the EMR cluster is planned for recreation as well although nothing changed there:

      ec2_attributes.0.emr_managed_master_security_group: "sg-057fe7bb416c5983f" => "" (forces new resource)
      ec2_attributes.0.emr_managed_slave_security_group:  "sg-01ac84737e433b8e1" => "" (forces new resource)
      ec2_attributes.0.instance_profile:                  "arn:aws:iam::744522205193:instance-profile/emr_profile" => "arn:aws:iam::744522205193:instance-profile/emr_profile"
      ec2_attributes.0.key_name:                          "sa-staging-emr" => "sa-staging-emr"
      ec2_attributes.0.service_access_security_group:     "sg-02cc532fcc7432a57" => "" (forces new resource)

If I fill in the ec2_attributes with those 3 "missing" attributes everything works correctly and the terraform doesn't attempt to recreate the cluster

[blckct]

TF doesn't seem to expect those attributes will be filled-in by default, should probably be marker as computed. It doesn't complain about service_access_security_group for me though, just the other two.

[bflad]

The fix for this has been merged and will release with version 2.45.0 of the Terraform AWS Provider, Thursday next week. Thanks to @blckct for the implementation. 👍

[ghost]

This has been released in version 2.45.0 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 for triage. Thanks!

[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!