An error occurred while deserializing the Exception property of class Serilog.Ui.MongoDbProvider.MongoDbLogModel: Cannot deserialize a 'String' from BsonType 'Document'.

[mesuttalebi]

Hello, I just configured Serilog with mongo db, and Serlilog ui to see the logs, but the error show in an alert box as soon as page opens.

not: ı can see logs in mongodb compass software.

An error occurred while deserializing the Exception property of class Serilog.Ui.MongoDbProvider.MongoDbLogModel: Cannot deserialize a 'String' from BsonType 'Document'.

serilog version: 2.1 asp.net core version: 5 mongodb version: 5.0.2

[mo-esmp]

Could please tell me which Serilog MongoDB sink you are using and send me the whole exception stack trace.

[mesuttalebi]

Could please tell me which Serilog MongoDB sink you are using and send me the whole exception stack trace.

Hello,

"Exception": {
        "_t": "FormatException",
        "HelpLink": null,
        "Source": "MongoDB.Bson",
        "HResult": -2146233033,
        "Message": "An error occurred while deserializing the Exception property of class Serilog.Ui.MongoDbProvider.MongoDbLogModel: Cannot deserialize a 'String' from BsonType 'Document'.",
        "StackTrace": "   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)\r\n   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeClass(BsonDeserializationContext context)\r\n   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)\r\n   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize[TValue](IBsonSerializer`1 serializer, BsonDeserializationContext context)\r\n   at MongoDB.Driver.Core.Operations.CursorBatchDeserializationHelper.DeserializeBatch[TDocument](RawBsonArray batch, IBsonSerializer`1 documentSerializer, MessageEncoderSettings messageEncoderSettings)\r\n   at MongoDB.Driver.Core.Operations.FindCommandOperation`1.CreateFirstCursorBatch(BsonDocument cursorDocument)\r\n   at MongoDB.Driver.Core.Operations.FindCommandOperation`1.CreateCursor(IChannelSourceHandle channelSource, IChannelHandle channel, BsonDocument commandResult)\r\n   at MongoDB.Driver.Core.Operations.FindCommandOperation`1.ExecuteAsync(RetryableReadContext context, CancellationToken cancellationToken)\r\n   at MongoDB.Driver.Core.Operations.FindOperation`1.ExecuteAsync(RetryableReadContext context, CancellationToken cancellationToken)\r\n   at MongoDB.Driver.Core.Operations.FindOperation`1.ExecuteAsync(IReadBinding binding, CancellationToken cancellationToken)\r\n   at MongoDB.Driver.OperationExecutor.ExecuteReadOperationAsync[TResult](IReadBinding binding, IReadOperation`1 operation, CancellationToken cancellationToken)\r\n   at MongoDB.Driver.MongoCollectionImpl`1.ExecuteReadOperationAsync[TResult](IClientSessionHandle session, IReadOperation`1 operation, ReadPreference readPreference, CancellationToken cancellationToken)\r\n   at MongoDB.Driver.MongoCollectionImpl`1.UsingImplicitSessionAsync[TResult](Func`2 funcAsync, CancellationToken cancellationToken)\r\n   at MongoDB.Driver.IAsyncCursorSourceExtensions.ToListAsync[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)\r\n   at Serilog.Ui.MongoDbProvider.MongoDbDataProvider.GetLogsAsync(Int32 page, Int32 count, String level, String searchCriteria, Nullable`1 startDate, Nullable`1 endDate)\r\n   at Serilog.Ui.MongoDbProvider.MongoDbDataProvider.FetchDataAsync(Int32 page, Int32 count, String level, String searchCriteria, Nullable`1 startDate, Nullable`1 endDate)\r\n   at Serilog.Ui.Web.SerilogUiMiddleware.FetchLogsAsync(HttpContext httpContext)\r\n   at Serilog.Ui.Web.SerilogUiMiddleware.Invoke(HttpContext httpContext)",
        "Data": {}
    }

[mo-esmp]

MongoDB sink changed the exception field type from string to object. I will fix that this weekend and sorry for the delay.