Machine Learning Inference request throws as error while serializing request

[Sudhakar85]

Elastic.Clients.Elasticsearch version: 9.0.1

Elasticsearch version: 9.0.1

.NET runtime version: 8

Operating system version: windows

Description of the problem including expected versus actual behavior:

Machine Learning Inference request throws json serializing error

Steps to reproduce:

var docs = new List<IDictionary<string, object>>
{
new Dictionary<string, object>
{
{ "text_field", "test")}
}
};

var request = new InferTrainedModelRequest()
{
ModelId = ".xx",
Docs = docs
};

await client.MachineLearning.InferTrainedModelAsync(request);

Expected behavior
call is throwing exception and it should get response from inference

Provide ConnectionSettings (if relevant):

Provide DebugInformation (if relevant):

FailureReason: Unrecoverable/Unexpected BadRequest while attempting POST on https://xx

• [1] BadRequest: Node: https://xx Exception: JsonException Took: 00:00:00.3530212

Audit exception in step 1 BadRequest:

System.Text.Json.JsonException: Unexpected token type 'StartObject' read while deserializing 'FieldValue'.
at Elastic.Clients.Elasticsearch.FieldValueConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/Shared/Core/Fields/FieldValueConverter.cs:line 46
at Elastic.Clients.Elasticsearch.Serialization.JsonReaderExtensions.<>c__131.<ReadSingleOrManyCollectionValue>b__13_0(Utf8JsonReader& r, JsonSerializerOptions o) in /_/src/Elastic.Clients.Elasticsearch/_Shared/Next/JsonReaderExtensions.cs:line 432 at Elastic.Clients.Elasticsearch.Serialization.JsonReaderExtensions.ReadSingleOrManyCollectionValue[T](Utf8JsonReader& reader, JsonSerializerOptions options, JsonReadFunc1 readElement) in //src/Elastic.Clients.Elasticsearch/Shared/Next/JsonReaderExtensions.cs:line 436
at Elastic.Clients.Elasticsearch.MachineLearning.InferenceResponseResultConverter.<>c.b__9_4(Utf8JsonReader& r, JsonSerializerOptions o) in //src/Elastic.Clients.Elasticsearch/Generated/Types/MachineLearning/InferenceResponseResult.g.cs:line 67
at Elastic.Clients.Elasticsearch.Serialization.JsonReaderExtensions.ReadSingleOrManyCollectionValue[T](Utf8JsonReader& reader, JsonSerializerOptions options, JsonReadFunc1 readElement) in /_/src/Elastic.Clients.Elasticsearch/_Shared/Next/JsonReaderExtensions.cs:line 436 at Elastic.Clients.Elasticsearch.MachineLearning.InferenceResponseResultConverter.<>c.<Read>b__9_2(Utf8JsonReader& r, JsonSerializerOptions o) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/MachineLearning/InferenceResponseResult.g.cs:line 67 at Elastic.Clients.Elasticsearch.MachineLearning.InferenceResponseResultConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/MachineLearning/InferenceResponseResult.g.cs:line 67 at Elastic.Clients.Elasticsearch.Serialization.JsonReaderExtensions.<>c__91.b__9_0(Utf8JsonReader& r, JsonSerializerOptions o) in //src/Elastic.Clients.Elasticsearch/_Shared/Next/JsonReaderExtensions.cs:line 276
at Elastic.Clients.Elasticsearch.Serialization.JsonReaderExtensions.ReadCollectionValue[T](Utf8JsonReader& reader, JsonSerializerOptions options, JsonReadFunc1 readElement) in /_/src/Elastic.Clients.Elasticsearch/_Shared/Next/JsonReaderExtensions.cs:line 282 at Elastic.Clients.Elasticsearch.MachineLearning.InferTrainedModelResponseConverter.<>c.<Read>b__1_0(Utf8JsonReader& r, JsonSerializerOptions o) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Api/MachineLearning/InferTrainedModelResponse.g.cs:line 36 at Elastic.Clients.Elasticsearch.MachineLearning.InferTrainedModelResponseConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Api/MachineLearning/InferTrainedModelResponse.g.cs:line 36 at System.Text.Json.Serialization.JsonConverter1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
at System.Text.Json.Serialization.JsonConverter1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state) at System.Text.Json.Serialization.Metadata.JsonTypeInfo1.ContinueDeserialize(ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack)