AWS DMS: Oracle в RDS Oracle Ошибки проверки миграции не регистрируются

Question

Мы пытаемся перенести данные из On Prem Oracle в AWS RDS Oracle. Мы получаем несколько несовпадающих записей. Чтобы понять причину, мы запрашиваем таблицу awsdms_validation_failures_v1, но столбец сведений всегда имеет значение null

select failure_time,DBMS_LOB.substr(details, 5000)

из "awsdms_validation_failures_v1"

Ниже приведена настройка для задачи

{
"TargetMetadata": {
    "TargetSchema": "yield",
    "SupportLobs": false,
    "FullLobMode": false,
    "LobChunkSize": 0,
    "LimitedSizeLobMode": false,
    "LobMaxSize": 0,
    "InlineLobMaxSize": 0,
    "LoadMaxFileSize": 0,
    "ParallelLoadThreads": 0,
    "ParallelLoadBufferSize": 0,
    "BatchApplyEnabled": false,
    "TaskRecoveryTableEnabled": false,
    "ParallelLoadQueuesPerThread": 0,
    "ParallelApplyThreads": 0,
    "ParallelApplyBufferSize": 0,
    "ParallelApplyQueuesPerThread": 0
},
"FullLoadSettings": {
    "TargetTablePrepMode": "DO_NOTHING",
    "CreatePkAfterFullLoad": false,
    "StopTaskCachedChangesApplied": false,
    "StopTaskCachedChangesNotApplied": false,
    "MaxFullLoadSubTasks": 8,
    "TransactionConsistencyTimeout": 600,
    "CommitRate": 10000
},
"Logging": {
    "EnableLogging": true,
    "LogComponents": [
        {
            "Id": "SOURCE_UNLOAD",
            "Severity": "LOGGER_SEVERITY_DEFAULT"
        },
        {
            "Id": "TARGET_LOAD",
            "Severity": "LOGGER_SEVERITY_DEFAULT"
        },
        {
            "Id": "SOURCE_CAPTURE",
            "Severity": "LOGGER_SEVERITY_DEFAULT"
        },
        {
            "Id": "TARGET_APPLY",
            "Severity": "LOGGER_SEVERITY_DEFAULT"
        },
        {
            "Id": "TASK_MANAGER",
            "Severity": "LOGGER_SEVERITY_DEFAULT"
        }
    ],
    "CloudWatchLogGroup": "dms-tasks-aws-dms-replication",
    "CloudWatchLogStream": "dms-task-XJD752EKKWXFEKK7T67O22XB2A"
},
"ControlTablesSettings": {
    "historyTimeslotInMinutes": 5,
    "ControlSchema": "YIELD",
    "HistoryTimeslotInMinutes": 5,
    "HistoryTableEnabled": true,
    "SuspendedTablesTableEnabled": true,
    "StatusTableEnabled": true
},
"StreamBufferSettings": {
    "StreamBufferCount": 3,
    "StreamBufferSizeInMB": 8,
    "CtrlStreamBufferSizeInMB": 5
},
"ChangeProcessingDdlHandlingPolicy": {
    "HandleSourceTableDropped": true,
    "HandleSourceTableTruncated": true,
    "HandleSourceTableAltered": true
},
"ErrorBehavior": {
    "DataErrorPolicy": "LOG_ERROR",
    "DataTruncationErrorPolicy": "LOG_ERROR",
    "DataErrorEscalationPolicy": "SUSPEND_TABLE",
    "DataErrorEscalationCount": 0,
    "TableErrorPolicy": "SUSPEND_TABLE",
    "TableErrorEscalationPolicy": "STOP_TASK",
    "TableErrorEscalationCount": 0,
    "RecoverableErrorCount": -1,
    "RecoverableErrorInterval": 5,
    "RecoverableErrorThrottling": true,
    "RecoverableErrorThrottlingMax": 1800,
    "ApplyErrorDeletePolicy": "IGNORE_RECORD",
    "ApplyErrorInsertPolicy": "LOG_ERROR",
    "ApplyErrorUpdatePolicy": "LOG_ERROR",
    "ApplyErrorEscalationPolicy": "LOG_ERROR",
    "ApplyErrorEscalationCount": 0,
    "ApplyErrorFailOnTruncationDdl": false,
    "FullLoadIgnoreConflicts": true,
    "FailOnTransactionConsistencyBreached": false,
    "FailOnNoTablesCaptured": false
},
"ChangeProcessingTuning": {
    "BatchApplyPreserveTransaction": true,
    "BatchApplyTimeoutMin": 1,
    "BatchApplyTimeoutMax": 30,
    "BatchApplyMemoryLimit": 500,
    "BatchSplitSize": 0,
    "MinTransactionSize": 1000,
    "CommitTimeout": 1,
    "MemoryLimitTotal": 1024,
    "MemoryKeepTime": 60,
    "StatementCacheSize": 50
},
"ValidationSettings": {
    "EnableValidation": true,
    "ValidationMode": "ROW_LEVEL",
    "ThreadCount": 5,
    "PartitionSize": 10000,
    "FailureMaxCount": 10000,
    "RecordFailureDelayInMinutes": 5,
    "RecordSuspendDelayInMinutes": 30,
    "MaxKeyColumnSize": 8096,
    "TableFailureMaxCount": 1000,
    "ValidationOnly": false,
    "HandleCollationDiff": false,
    "RecordFailureDelayLimitInMinutes": 0
},
"PostProcessingRules": null,
"CharacterSetSettings": null,
"LoopbackPreventionSettings": null,
"BeforeImageSettings": null

}

Снимок экрана параметра задачи Advance