ConcurrentMutationLimitExceeded - while creating multiple aws_ec2_client_vpn_route

[D3N14L]

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Terraform CLI and Terraform AWS Provider Version

Terraform v0.15.5
on darwin_amd64

• provider registry.terraform.io/hashicorp/aws v3.43.0
• provider registry.terraform.io/hashicorp/template v2.2.0
• provider registry.terraform.io/hashicorp/tls v3.1.0

Affected Resource(s)

• aws_ec2_client_vpn_route

Terraform Configuration Files

I used the example from https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_client_vpn_route
and created 21 objects of type ec2_client_vpn_route.

Debug Output

│ Error: error creating client VPN route "cvpn-endpoint-xxx,subnet-yyy,10.0.13.0/24": ConcurrentMutationLimitExceeded: Cannot initiate another change for this endpoint at this time. Please try again later.
│ 	status code: 400, request id: 80f05565-...
│
│   with module.test_infra_client_vpn.aws_ec2_client_vpn_route.this[14],
│   on .terraform/modules/client_vpn/client-vpn.tf line 80, in resource "aws_ec2_client_vpn_route" "this":
│   80: resource "aws_ec2_client_vpn_route" "this" {
│

Expected Behavior

As this is "just" a concurrency problem, the provider should recognize the Error and retry the operation until the resource has been created.

Actual Behavior

Some of the resources won´t get created due to this error. However, each time I re-run terraform apply some more resources get created.

Steps to Reproduce

• Create a ClientVPN endpoint
• add a larger number of aws_ec2_client_vpn_routes (~20) to it.

Important Factoids

References

[github-actions]

This functionality has been released in v4.0.0 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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