Attribute mismatch error after apply for TypeSet attribute

[kilokahn]

Terraform Version

v0.11.7

Terraform Configuration Files

variable "tenancy_ocid" {}

variable "user_ocid" {}
variable "fingerprint" {}
variable "private_key_path" {}
variable "compartment_ocid" {}
variable "region" {}

provider "oci" {
  region           = "${var.region}"
  tenancy_ocid     = "${var.tenancy_ocid}"
  user_ocid        = "${var.user_ocid}"
  fingerprint      = "${var.fingerprint}"
  private_key_path = "${var.private_key_path}"
}

resource "oci_core_vcn" "test_vcn" {
  cidr_block     = "10.0.0.0/16"
  compartment_id = "${var.compartment_ocid}"

  display_name = "mubaig-vcn"
}

resource "oci_core_internet_gateway" "test_internet_gateway" {
  compartment_id = "${var.compartment_ocid}"
  display_name   = "mubaig-ig"
  vcn_id         = "${oci_core_vcn.test_vcn.id}"
}

resource "oci_core_route_table" "test_route_table" {
  #Required
  compartment_id = "${var.compartment_ocid}"
  count          = 1

  route_rules {
    network_entity_id = "${lookup(data.oci_core_private_ips.test_private_ips.private_ips[0], "id")}"
    destination = "0.0.0.0/0"
  }

  route_rules {
    network_entity_id = "${lookup(data.oci_core_private_ips.test_private_ips2.private_ips[0], "id")}"
    destination = "160.34.15.48/29"
  }

  route_rules {
    network_entity_id = "${oci_core_internet_gateway.test_internet_gateway.id}"
    destination = "130.35.140.191/32"
  }

  vcn_id = "${oci_core_vcn.test_vcn.id}"

  display_name = "mubaig-route-table"
}

data "oci_identity_availability_domains" "ad" {
  compartment_id = "${var.tenancy_ocid}"
}

resource "oci_core_subnet" "test_subnet" {
  availability_domain = "${lookup(data.oci_identity_availability_domains.ad.availability_domains[0],"name")}"
  cidr_block          = "10.0.1.0/24"
  display_name        = "mubaig-subnet"
  compartment_id      = "${var.compartment_ocid}"
  vcn_id              = "${oci_core_vcn.test_vcn.id}"
}

resource "oci_core_instance" "test_instance" {
  depends_on = ["oci_core_subnet.test_subnet"]
  count      = 2

  availability_domain = "${lookup(data.oci_identity_availability_domains.ad.availability_domains[0], "name")}"
  compartment_id      = "${var.compartment_ocid}"
  display_name        = "mubaig-test-instance"
  shape               = "VM.Standard2.1"

  create_vnic_details {
    subnet_id              = "${oci_core_subnet.test_subnet.id}"
    skip_source_dest_check = "true"
  }

  source_details {
    #Required
    source_id   = "ocid1.image.oc1.phx.aaaaaaaaozjbzisykoybkppaiwviyfzusjzokq7jzwxi7nvwdiopk7ligoia"
    source_type = "image"
  }
}

data "oci_core_private_ips" "test_private_ips" {
  depends_on = ["oci_core_instance.test_instance"]
  subnet_id  = "${element(oci_core_subnet.test_subnet.*.id, 0)}"
  ip_address = "${element(oci_core_instance.test_instance.*.private_ip, 0)}"
}

data "oci_core_private_ips" "test_private_ips2" {
  depends_on = ["oci_core_instance.test_instance"]
  subnet_id  = "${element(oci_core_subnet.test_subnet.*.id, 0)}"
  ip_address = "${element(oci_core_instance.test_instance.*.private_ip, 1)}"
}

Debug Output

https://gist.github.com/kilokahn/77110e1608aeddc5b64d5d10eaca3c77

Crash Output

N/A

Expected Behavior

There should have been no failures in the apply (in fact there shouldn't have been a diff itself)

Actual Behavior

Apply fails

Steps to Reproduce

1. terraform init
2. terraform plan
3. terraform apply
4. terraform plan # this should be empty, but it isn't
5. terraform apply # this fails

Additional Context

When multiple route_rules are present, terraform's state diff comparison seems to be failing.

References

A related issue for the unnecessary change in plan is logged in #19933

[kilokahn]

Since the original problem of the #19933 spurious plan diff is solved, this becomes somewhat irrelevant. I will leave it up to you to see if this needs any investigation.

[mildwonkey]

Thanks @kilokahn , I'll close this as also a duplicate - thank you for opening the issues, and updating this one!

Duplicate of #18600

[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 have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.