aws_lambda_event_source_mapping - maximum_retry_attempts are set to 10000 when trying to set 0

[cybulr]

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Terraform Version

Terraform v0.12.21

• provider.aws v2.51.0

Affected Resource(s)

• aws_lambda_event_source_mapping

Terraform Configuration Files

resource "aws_lambda_event_source_mapping" "kinesis" {
  count                  = var.kinesis_trigger != null && var.enabled  ? 1 : 0
  event_source_arn       = var.kinesis_trigger.event_source_arn
  function_name          = aws_lambda_function.lambda.function_name
  starting_position      = var.kinesis_trigger.starting_position
  batch_size             = var.kinesis_trigger.batch_size
  parallelization_factor = var.kinesis_trigger.parallelization_factor
  maximum_retry_attempts = var.kinesis_trigger.maximum_retry_attempts
  destination_config {
    on_failure {
      destination_arn = var.kinesis_trigger.destination_arn_on_failure
    }
  }
}

    kinesis_trigger = {
        event_source_arn  		      = "arn:aws:kinesis:eu-west-1:XXX:stream/XXX"
        starting_position 		      = "LATEST"
        batch_size        		      = 100       
        parallelization_factor	    = 1
        maximum_retry_attempts	    = 0
        destination_arn_on_failure	= "arn:aws:sqs:eu-west-1:XXX:XXX"
    }

Terraform apply Output

  # module.XXX.aws_lambda_event_source_mapping.kinesis[0] will be created
  + resource "aws_lambda_event_source_mapping" "kinesis" {
      + batch_size                    = 100
      + enabled                       = true
      + event_source_arn              = "arn:aws:kinesis:eu-west-1:XXX:stream/XXX"
      + function_arn                  = (known after apply)
      + function_name                 = "XXX"
      + id                            = (known after apply)
      + last_modified                 = (known after apply)
      + last_processing_result        = (known after apply)
      + maximum_record_age_in_seconds = (known after apply)
      + maximum_retry_attempts        = 0
      + parallelization_factor        = 1
      + starting_position             = "LATEST"
      + state                         = (known after apply)
      + state_transition_reason       = (known after apply)
      + uuid                          = (known after apply)

      + destination_config {
          + on_failure {
              + destination_arn = "arn:aws:sqs:eu-west-1:XXX:XXX"
            }
        }
    }

module.preprocessor.aws_lambda_event_source_mapping.kinesis[0]: Creation complete after 1s [id=489db491-ae3e-4660-b19e-2560972670f5]

aws lambda list-event-source-mappings Output

    "EventSourceMappings": [
        {
            "UUID": "489db491-ae3e-4660-b19e-2560972670f5",
            "BatchSize": 100,
            "MaximumBatchingWindowInSeconds": 0,
            "ParallelizationFactor": 1,
            "EventSourceArn": "arn:aws:kinesis:eu-west-1:XXX:stream/XXX",
            "FunctionArn": "arn:aws:lambda:eu-west-1:XXX:function:XXX",
            "LastModified": 1584550140.0,
            "LastProcessingResult": "No records processed",
            "State": "Enabled",
            "StateTransitionReason": "User action",
            "DestinationConfig": {
                "OnFailure": {
                    "Destination": "arn:aws:sqs:eu-west-1:XXX:XXX"
                }
            },
            "MaximumRecordAgeInSeconds": 604800,
            "BisectBatchOnFunctionError": false,
            "MaximumRetryAttempts": 10000
        },

Expected Behavior

As we can see in terraform apply output, event source mapping with 0 retries should be created.

Actual Behavior

When setting up 0 as a value in terraform for Maximum Retry Attempts, it always creates a mapping with default value 10000 instead of 0. For all other values it works correctly. I also checked result of creating it using AWS CLI and it works correctly for value of "0", so I think there is an bug in provider.

Steps to Reproduce

1. terraform apply
2. 'aws lambda list-event-source-mappings'

[anGie44]

The bug fix has been merged and will release with the upcoming v3.1.0 of the Terraform AWS Provider.

This has been released in version 3.1.0 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 for triage. Thanks!

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If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!