[BUG]Provider produced inconsistent final plan

[rishabhToshniwal]

What is the bug?

Provider produced inconsistent final plan when the 'body' value for resource opensearch_component_template changes from plan to apply. In my case the body template would be dynamically fetched from private repo using null_resource. So during plan phase its considering the "{}" value while actually apply returns a JSON template resulting into this issue.

How can one reproduce the bug?

locals{
component_templates_map = {"my-template1": "http://localnexus:8080/mytemplatefile1"}
}
resource "null_resource" "download_component_templates"{
Downloading file from the local nexus and redirecting the response body into the file
}

resource "opensearch_component_template" "component_tempalte" {
provider = opensearch.opensearch_provider
for_each = local.component_templates_map
name = each.key
body = try(file("${path.module}/${each.key}_components.json"), "{}")
depends_on = [null_resource.download_component_templates]
}

Provider
opensearch = {
source = "opensearch-project/opensearch"
version = "2.2.1"
}

What is the expected behavior?

Open search component to be created.

What is your host/environment?

Linux

Do you have any screenshots?

Do you have any additional context?

Add any other context about the problem.

[rblcoder]

The attribute needs the same value for plan phase and apply phase, hence the error.

[rblcoder]

Further reference from hashicorp/terraform#25090 :
The general rule underlying that error is that if the plan for a particular attribute has a known value (anything other than "known after apply") during planning, the value must be exactly the same after the apply phase.

[estein9825]

I got the error by updating the access rights of the data policy with a new value. Planning showed it was going to update, and it did so at the apply. However it then spit out the error right after. So there is a bug with the read after the update.

[nidnogg]

+1 on this, it is quite the struggle to get this piece working with AWS OpenSearch right now.

[estein9825]

If I then try rerunning it again, I get this error:

ValidationException: No changes detected in policy or policy description