azure data factory copy activity Uri string is too long

I try to load a JSON file from Azure storage into Azure data explorer via Azure data factory.
The file is in 'one-line', 'nested' JSON format. (about 5~10 MB)

{"value":[{"col1":1, "col2":2},{"col1":11, "col2":22} ... ]}

Since I am not familiar with the JSON mapping syntax in Azure data explorer, I just simply load the file in to a table.
Which leads to only 1 column exists in that table (with default mapping rule).

Here is my COPY activity setup:

However, I get this error: 【Type=System.UriFormatException,Message=Invalid URI: The Uri string is too long.,Source=System,'】

[Update]

After some modification, I received new error message (I add 'database user' & 'database ingestor' for my Azure data factory instance)

input

{
"source": {
"type": "JsonSource",
"storeSettings": {
"type": "AzureBlobStorageReadSettings",
"recursive": false,
"wildcardFileName": "2022-02-17.json",
"enablePartitionDiscovery": false
},
"formatSettings": {
"type": "JsonReadSettings"
}
},
"sink": {
"type": "AzureDataExplorerSink",
"ingestionMappingName": ""
},
"enableStaging": false
}

ouput

{
"dataRead": 3416480,
"dataWritten": 0,
"filesRead": 1,
"sourcePeakConnections": 1,
"sinkPeakConnections": 1,
"rowsRead": 1,
"rowsCopied": 1,
"copyDuration": 7,
"throughput": 476.629,
"errors": [
{
"Code": 11204,
"Message": "ErrorCode=UserErrorKustoWriteFailed,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Write to Kusto failed with following error: An error occurred for source: 'DataReader'. Error: 'CsvWriter: Cannot skip to the next line as the current line is still empty'.,Source=Microsoft.DataTransfer.Runtime.KustoConnector,''Type=Kusto.Ingest.Exceptions.IngestClientException,Message=An error occurred for source: 'DataReader'. Error: 'CsvWriter: Cannot skip to the next line as the current line is still empty',Source=Kusto.Ingest,''Type=Kusto.Cloud.Platform.Utils.UtilsInvalidOperationException,Message=CsvWriter: Cannot skip to the next line as the current line is still empty,Source=Kusto.Cloud.Platform,'",
"EventType": 0,
"Category": 5,
"Data": {},
"MsgId": null,
"ExceptionType": null,
"Source": null,
"StackTrace": null,
"InnerEventInfos": []
}
],
"effectiveIntegrationRuntime": "AutoResolveIntegrationRuntime (Japan East)",
"usedDataIntegrationUnits": 4,
"billingReference": {
"activityType": "DataMovement",
"billableDuration": [
{
"meterType": "AzureIR",
"duration": 0.06666666666666667,
"unit": "DIUHours"
}
]
},
"usedParallelCopies": 1,
"executionDetails": [
{
"source": {
"type": "AzureBlobStorage",
"region": "Japan East"
},
"sink": {
"type": "AzureDataExplorer"
},
"status": "Failed",
"start": "2022-02-17T04:02:13.0176604Z",
"duration": 7,
"usedDataIntegrationUnits": 4,
"usedParallelCopies": 1,
"profile": {
"queue": {
"status": "Completed",
"duration": 4
},
"transfer": {
"status": "Completed",
"duration": 3,
"details": {
"listingSource": {
"type": "AzureBlobStorage",
"workingDuration": 0
},
"readingFromSource": {
"type": "AzureBlobStorage",
"workingDuration": 0
},
"writingToSink": {
"type": "AzureDataExplorer"
}
}
}
},
"detailedDurations": {
"queuingDuration": 4,
"transferDuration": 3
}
}
],
"dataConsistencyVerification": {
"VerificationResult": "NotVerified"
},
"durationInQueue": {
"integrationRuntimeQueue": 0
}
}

error message

Failure type:
User configuration issue
Details:
ErrorCode=UserErrorKustoWriteFailed,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Write to Kusto failed with following error: An error occurred for source: 'DataReader'. Error: 'CsvWriter: Cannot skip to the next line as the current line is still empty'.,Source=Microsoft.DataTransfer.Runtime.KustoConnector,''Type=Kusto.Ingest.Exceptions.IngestClientException,Message=An error occurred for source: 'DataReader'. Error: 'CsvWriter: Cannot skip to the next line as the current line is still empty',Source=Kusto.Ingest,''Type=Kusto.Cloud.Platform.Utils.UtilsInvalidOperationException,Message=CsvWriter: Cannot skip to the next line as the current line is still empty,Source=Kusto.Cloud.Platform,'

After some searching, I am still not able to find a solution.
Any suggestion?