AnotherOperationInProgress Error

[dbergel]

Problem

Executing terraform apply may intermittently fail with the following error

Error: creating Subnet: (Name "dc-subnet" / Virtual Network Name "vnet-centralus" / Resource Group "cas-mgr-single-connector-r6ikn"): network.SubnetsClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error: autorest/azure: Service returned an error. Status=<nil> Code="AnotherOperationInProgress" Message="Another operation on this or dependent resource is in progress. To retrieve status of the operation use uri: https://management.azure.com/subscriptions/6130794d-3700-4597-8e5d-2b09a0a303c0/providers/Microsoft.Network/locations/centralus/operations/00bf947d-99f9-4df9-963c-b8b28c0d61d2?api-version=2021-05-01." Details=[]

Deployments Affected

• cas-mgr-single-connector
• casm-aadds-single-connector

Cause

Appears to be a dependency/concurrency issue whereby multiple VNet modification operations are attempted simultaneously. Effort is ongoing to identify a minimal reproduction case & potentially introduce explicit dependencies as appropriate.

Workaround

As the issue is intermittent, simply running terraform destroy and re-running terraform apply should be sufficient.