[Bug]: aws_dms_replication_config has persistent changes

[christyWtt]

Terraform Core Version

1.3.1

AWS Provider Version

5.31.0

Affected Resource(s)

aws_dms_replication_config

Expected Behavior

Apply config parameters consistently

Actual Behavior

It wants to remove the replication_settings and it is not configured by terraform. In my replication_settings, I just configure the "Logging" settings. However, the terraform plan show many changes of replication_settings.

Relevant Error/Panic Output Snippet

# On plan:
 # module.dms_full_load_serverless_replications.aws_dms_replication_config.dms_cdc_serverless_replication will be updated in-place
  ~ resource "aws_dms_replication_config" "dms_cdc_serverless_replication" {
        id                            = "arn:aws:dms:us-east-1:xxx:replication-config:xxx-cdc"
      ~ replication_settings          = jsonencode(
          ~ {
              - BeforeImageSettings                 = null -> null
              - ChangeProcessingDdlHandlingPolicy   = {
                  - HandleSourceTableAltered   = true
                  - HandleSourceTableDropped   = true
                  - HandleSourceTableTruncated = true
                } -> null
              - ChangeProcessingTuning              = {
                  - BatchApplyMemoryLimit         = 500
                  - BatchApplyPreserveTransaction = true
                  - BatchApplyTimeoutMax          = 30
                  - BatchApplyTimeoutMin          = 1
                  - BatchSplitSize                = 0
                  - CommitTimeout                 = 1
                  - MemoryKeepTime                = 60
                  - MemoryLimitTotal              = 1024
                  - MinTransactionSize            = 1000
                  - StatementCacheSize            = 50
                } -> null
              - CharacterSetSettings                = null -> null
              - ControlTablesSettings               = {
                  - CommitPositionTableEnabled    = false
                  - ControlSchema                 = ""
                  - FullLoadExceptionTableEnabled = false
                  - HistoryTableEnabled           = false
                  - HistoryTimeslotInMinutes      = 5
                  - StatusTableEnabled            = false
                  - SuspendedTablesTableEnabled   = false
                  - historyTimeslotInMinutes      = 5
                } -> null
              - ErrorBehavior                       = {
                  - ApplyErrorDeletePolicy                      = "IGNORE_RECORD"
                  - ApplyErrorEscalationCount                   = 0
                  - ApplyErrorEscalationPolicy                  = "LOG_ERROR"
                  - ApplyErrorFailOnTruncationDdl               = false
                  - ApplyErrorInsertPolicy                      = "LOG_ERROR"
                  - ApplyErrorUpdatePolicy                      = "LOG_ERROR"
                  - DataErrorEscalationCount                    = 0
                  - DataErrorEscalationPolicy                   = "SUSPEND_TABLE"
                  - DataErrorPolicy                             = "LOG_ERROR"
                  - DataTruncationErrorPolicy                   = "LOG_ERROR"
                  - EventErrorPolicy                            = "IGNORE"
                  - FailOnNoTablesCaptured                      = true
                  - FailOnTransactionConsistencyBreached        = false
                  - FullLoadIgnoreConflicts                     = true
                  - RecoverableErrorCount                       = -1
                  - RecoverableErrorInterval                    = 5
                  - RecoverableErrorStopRetryAfterThrottlingMax = true
                  - RecoverableErrorThrottling                  = true
                  - RecoverableErrorThrottlingMax               = 1800
                  - TableErrorEscalationCount                   = 0
                  - TableErrorEscalationPolicy                  = "STOP_TASK"
                  - TableErrorPolicy                            = "SUSPEND_TABLE"
                } -> null
              - FailTaskWhenCleanTaskResourceFailed = false -> null
              - FullLoadSettings                    = {
                  - CommitRate                      = 10000
                  - CreatePkAfterFullLoad           = false
                  - MaxFullLoadSubTasks             = 8
                  - StopTaskCachedChangesApplied    = false
                  - StopTaskCachedChangesNotApplied = false
                  - TargetTablePrepMode             = "DO_NOTHING"
                  - TransactionConsistencyTimeout   = 600
                } -> null
              ~ Logging                             = {
                  - CloudWatchLogGroup  = "dms-serverless-replication-xxx-cdc" -> null
                  - CloudWatchLogStream = "dms-serverless-serv-res-id-xxx-b4gn" -> null
                  - EnableLogContext    = false -> null
                    # (2 unchanged elements hidden)
                }
              - LoopbackPreventionSettings          = null -> null
              - PostProcessingRules                 = null -> null
              - StreamBufferSettings                = {
                  - CtrlStreamBufferSizeInMB = 5
                  - StreamBufferCount        = 3
                  - StreamBufferSizeInMB     = 8
                } -> null
              - TTSettings                          = {
                  - EnableTT            = false
                  - FailTaskOnTTFailure = false
                  - TTRecordSettings    = null
                  - TTS3Settings        = null
                } -> null
              - TargetMetadata                      = {
                  - BatchApplyEnabled            = false
                  - FullLobMode                  = false
                  - InlineLobMaxSize             = 0
                  - LimitedSizeLobMode           = true
                  - LoadMaxFileSize              = 0
                  - LobChunkSize                 = 64
                  - LobMaxSize                   = 32
                  - ParallelApplyBufferSize      = 0
                  - ParallelApplyQueuesPerThread = 0
                  - ParallelApplyThreads         = 0
                  - ParallelLoadBufferSize       = 0
                  - ParallelLoadQueuesPerThread  = 0
                  - ParallelLoadThreads          = 0
                  - SupportLobs                  = true
                  - TargetSchema                 = ""
                  - TaskRecoveryTableEnabled     = false
                } -> null
            }
        )
        tags                          = {
            "Client"   = "xxx"
            "Domain"   = "xxx"
            "Solution" = "xxx"
            "Type"     = "xxx"
            "Use"      = "xxx"
        }
        # (9 unchanged attributes hidden)
        # (1 unchanged block hidden)
    }

# On apply:
Error: updating DMS Replication Config (arn:aws:dms:us-east-1:xxx:replication-config:load-xxx-domain): InvalidParameterValueException: Replication with replication config arn 'arn:aws:dms:us-east-1:xxx:replication-config:load-xxx-domain' cannot be modified as the replication is in deprovisioning. You can only modify replication configs before provisioning capacity.
│ 	status code: 400, request id: ab04b1d6-4d9f-4a5e-a880-b8f1a676dca9
│ 
│   with module.dms_full_load_serverless_replications.aws_dms_replication_config.dms_full_load_serverless_replication[3],
│   on ../../../modules/dms/instance/dms_replication_instance.tf line 136, in resource "aws_dms_replication_config" "dms_full_load_serverless_replication":
│  136: resource "aws_dms_replication_config" "dms_full_load_serverless_replication" {

Terraform Configuration Files

resource "aws_dms_replication_config" "dms_full_load_serverless_replication" {
  count = length(var.full_load_domain_list)

  replication_config_identifier = replace(substr("${local.usage}-${var.full_load_domain_list[count.index].domain_name}",0,31), "/-$/", "")
  resource_identifier           = replace(substr("${local.usage}-${var.full_load_domain_list[count.index].domain_name}",0,31), "/-$/", "")
  replication_type              = "full-load"
  source_endpoint_arn           = var.source_endpoint_arn
  target_endpoint_arn           = aws_dms_s3_endpoint.full_load_target_endpoint[count.index].endpoint_arn
  table_mappings                = data.template_file.full_load_table_mapping[count.index].rendered
  replication_settings          = var.replication_settings

  compute_config {
    max_capacity_units           = var.full_load_max_capacity_units
    min_capacity_units           = var.full_load_min_capacity_units
    multi_az                     = var.multi_az
    availability_zone            = var.availability_zone
    preferred_maintenance_window = var.preferred_maintenance_window
    replication_subnet_group_id  = aws_dms_replication_subnet_group.dms_subnet_group.id
    vpc_security_group_ids       = [aws_security_group.replication_instance_sg.id]
  }

  tags = {
    Solution = var.context["solution"]
    Client   = var.context["client"]
    Use      = var.context["usage"]
    Domain   = var.full_load_domain_list[count.index].domain_name
    Type     = "full-load"
  }

  depends_on = [
    aws_iam_role_policy_attachment.dms-access-for-endpoint-AmazonDMSRedshiftS3Role,
    aws_iam_role_policy_attachment.dms-cloudwatch-logs-role-AmazonDMSCloudWatchLogsRole,
    aws_iam_role_policy_attachment.dms-vpc-role-AmazonDMSVPCManagementRole
  ]
}


#replication setting
{
    "Logging": {
        "EnableLogging": true,
        "LogComponents": [
            {
                "Id": "TRANSFORMATION",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "SOURCE_UNLOAD",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "IO",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TARGET_LOAD",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "PERFORMANCE",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "SOURCE_CAPTURE",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "SORTER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "REST_SERVER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "VALIDATOR_EXT",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TARGET_APPLY",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TASK_MANAGER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "TABLES_MANAGER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "METADATA_MANAGER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "FILE_FACTORY",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "COMMON",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "ADDONS",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "DATA_STRUCTURE",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "COMMUNICATION",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            },
            {
                "Id": "FILE_TRANSFER",
                "Severity": "LOGGER_SEVERITY_DEFAULT"
            }
        ]
    }
}

Steps to Reproduce

1. apply the configuration to create a dms serverless application
2. try to apply again and receive the error above

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

None

[github-actions]

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[justinretzolk]

Hey @christyWtt 👋 Thank you for taking the time to raise this! This was fixed with #34356, which was included with version 5.32.0 of the provider. Given that this was a known issue that was recently fixed, we'll close this issue. If you have additional issues after upgrading, please open a new issue, referencing this one as needed.

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.