terraform resource aws-parallelcluster_cluster, provider aws-parallelcluster: │ Error: json: cannot unmarshal number into Go struct field Change.changeSet.currentValue of type string

[abazzi-neogenomics]

Hello there, I'm using terraform 1.6.6 and aws-parallelcluster 1.1.0
I'm able to successfully create apis and clusters (tried both 3.8.0 and 3.11.1), but when the cluster needs updating, terraform throws this error:

│   with module.clusters-3-11-1.aws-parallelcluster_cluster.managed_configs["test-tfpcluster3-slurm02"],
│   on ../modules/pcluster/main.tf line 1, in resource "aws-parallelcluster_cluster" "managed_configs":
│    1: resource "aws-parallelcluster_cluster" "managed_configs" {
│
│ Error: json: cannot unmarshal number into Go struct field Change.changeSet.currentValue of type string
│ Message: {{
│   "changeSet": [
│     {
│       "currentValue": 20,
│       "parameter": "Scheduling.SlurmQueues[main-queue].ComputeResources[large].MaxCount",
│       "requestedValue": 25
│     },
│     {
│       "currentValue": 20,
│       "parameter": "Scheduling.SlurmQueues[main-queue].ComputeResources[medium].MaxCount",
│       "requestedValue": 25
│     },
│     {
│       "currentValue": 20,
│       "parameter": "Scheduling.SlurmQueues[main-queue].ComputeResources[tiny].MaxCount",
│       "requestedValue": 25
│     }
│   ],
│   "cluster": {
│     "cloudformationStackArn": "arn:aws:cloudformation:eu-west-1:xxxxx:stack/euw1-dev-test-tfpcluster3-slurm02/b08d4580-933a-11f0-a36b-02d50a478753",
│     "cloudformationStackStatus": "UPDATE_IN_PROGRESS",
│     "clusterName": "euw1-dev-test-tfpcluster3-slurm02",
│     "clusterStatus": "UPDATE_IN_PROGRESS",
│     "region": "eu-west-1",
│     "scheduler": {
│       "type": "slurm"
│     },
│     "version": "3.11.1"
│   }
│ }
│ }

The cloudformation stack gets updated anyway (as you see it already reports it in progress) and succeeds but terraform errors out in update, the second plan/apply shows matching infrastructure.

I tried adding and removing double quotes in the template I'm using but no luck.
I tried both with the native resource aws-parallelcluster_cluster and with @gmarciani 's terraform module but I faced the same issue.

I can provide more code snippets if needed

[hgreebe]

Hello,
This is a parallelcluster API issue that we have fixed in pcluster 3.12.0:

aws-parallelcluster/CHANGELOG.md

Line 172 in 502494f

- Fix an issue where when using PCAPI, cluster update could fail when updating a parameter that is not type `String` (e.g. `MaxCount`).