azure data factory - timeout sink side

I try to transform big tables to azure SQL server. while the small one are completed, the big ones aren't, and fall on timeout sink side. the errors are attached. while the sql server doesn’t has any timeout specified, it still wont work.

the sql db is 800 DTU.

how do i increase the timeout at sink side, if that is the problem.

isn't the data factory supposed to save the connection and retry if failed?

errors:
{
    "dataRead": 1372864152,
    "dataWritten": 1372864152,
    "sourcePeakConnections": 1,
    "sinkPeakConnections": 2,
    "rowsRead": 2205634,
    "rowsCopied": 2205634,
    "copyDuration": 8010,
    "throughput": 167.377,
    "errors": [
        {
            "Code": 11000,
            "Message": "Failure happened on 'Sink' side. 'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Timeouts in SQL write operation.,Source=Microsoft.DataTransfer.ClientLibrary,''Type=System.Data.SqlClient.SqlException,Message=Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.,Source=.Net SqlClient Data Provider,SqlErrorNumber=-2,Class=11,ErrorCode=-2146232060,State=0,Errors=[{Class=11,Number=-2,State=0,Message=Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.,},],''Type=System.ComponentModel.Win32Exception,Message=The wait operation timed out,Source=,'",
            "EventType": 0,
            "Category": 5,
            "Data": {
                "FailureInitiator": "Sink"
            },
            "MsgId": null,
            "ExceptionType": null,
            "Source": null,
            "StackTrace": null,
            "InnerEventInfos": []
        }
    ],
    "effectiveIntegrationRuntime": "XXX",
    "billingReference": {
        "activityType": "DataMovement",
        "billableDuration": [
            {
                "meterType": "SelfhostedIR",
                "duration": 2.0166666666666666,
                "unit": "Hours"
            }
        ]
    },
    "usedParallelCopies": 1,
    "executionDetails": [
        {
            "source": {
                "type": "SqlServer"
            },
            "sink": {
                "type": "SqlServer"
            },
            "status": "Failed",
            "start": "2020-08-03T17:16:58.8388528Z",
            "duration": 8010,
            "usedParallelCopies": 1,
            "profile": {
                "queue": {
                    "status": "Completed",
                    "duration": 810
                },
                "preCopyScript": {
                    "status": "Completed",
                    "duration": 0
                },
                "transfer": {
                    "status": "Completed",
                    "duration": 7200,
                    "details": {
                        "readingFromSource": {
                            "type": "SqlServer",
                            "workingDuration": 7156,
                            "timeToFirstByte": 0
                        },
                        "writingToSink": {
                            "type": "SqlServer"
                        }
                    }
                }
            },
            "detailedDurations": {
                "queuingDuration": 810,
                "preCopyScriptDuration": 0,
                "timeToFirstByte": 0,
                "transferDuration": 7200
            }
        }
    ],
    "dataConsistencyVerification": {
        "VerificationResult": "NotVerified"
    },
    "durationInQueue": {
        "integrationRuntimeQueue": 810
    }
}