Attempt to get index/indices results in UnexpectedTransportException

[Sharparam]

Elastic.Clients.Elasticsearch version: 8.1.1

Elasticsearch version: 8.7.1

.NET runtime version: .NET 6 as the target framework

Operating system version: Windows 11, 10.0.22621 Build 22621

Description of the problem including expected versus actual behavior:
When attempting to get indices using ElasticSearchClient.Indices.GetAsync("a-pattern*");, an exception is thrown.

Steps to reproduce:

1. Call ElasticSearchClient.Indices.GetAsync with a string pattern like "foo*"
2. UnexpectedTransportException is thrown

Expected behavior
A response with indices matching the pattern is returned.

Additional:
The problem seems to be the property ReadOnlyAllowDelete in the generated file IndexSettingBlocks.g.cs:

public sealed partial class IndexSettingBlocks
{
	// ...

	[JsonInclude, JsonPropertyName("read_only_allow_delete")]
	public bool? ReadOnlyAllowDelete { get; set; }
	
	// ...
}

In the generated file, this is a bool?, but in the response returned from Elastic Search, it's a string:

{
  "<INDEX_NAME>": {
    "aliases": {},
    "mappings": {},
    "settings": {
      "index": {
        "blocks": {
          "read_only_allow_delete": "false"
        }
      }
    }
  }
}

Perhaps a custom converter is needed here?

Provide ConnectionSettings (if relevant): N/A

Provide DebugInformation (if relevant):

(URLs cleaned)

# FailureReason: Unrecoverable/Unexpected BadResponse while attempting GET on https://<SNIP>/<PATTERN>?pretty=true&error_trace=true
 - [1] BadResponse: Node: https://<SNIP>/ Exception: JsonException Took: 00:00:00.7023241
# Audit exception in step 1 BadResponse:
System.Text.Json.JsonException: The JSON value could not be converted to System.Nullable`1[System.Boolean]. Path: $.read_only_allow_delete | LineNumber: 1 | BytePositionInLine: 44.
 ---> System.InvalidOperationException: Cannot get the value of a token type 'String' as a boolean.
   at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_ExpectedBoolean(JsonTokenType tokenType)
   at System.Text.Json.Utf8JsonReader.GetBoolean()
   at System.Text.Json.Serialization.Converters.BooleanConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Converters.NullableConverter`1.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.IndexManagement.IndexSettingsConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/IndexManagement/IndexSettings.g.cs:line 63
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.IndexManagement.IndexSettingsConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/IndexManagement/IndexSettings.g.cs:line 129
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, TDictionary& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.Serialization.DictionaryResponseConverterFactory.ResolvableDictionaryResponseConverterInner`3.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/Serialization/DictionaryResponseConverter.cs:line 74
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.ContinueDeserialize[TValue](ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.ReadFromStreamAsync[TValue](Stream utf8Json, JsonTypeInfo jsonTypeInfo, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultResponseBuilder`1.SetBodyAsync[TResponse](ApiCallDetails details, RequestData requestData, Stream responseStream, String mimeType, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultResponseBuilder`1.ToResponseAsync[TResponse](RequestData requestData, Exception ex, Nullable`1 statusCode, Dictionary`2 headers, Stream responseStream, String mimeType, Int64 contentLength, IReadOnlyDictionary`2 threadPoolStats, IReadOnlyDictionary`2 tcpStats, CancellationToken cancellationToken)
   at Elastic.Transport.HttpTransportClient.RequestAsync[TResponse](RequestData requestData, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultRequestPipeline`1.CallProductEndpointAsync[TResponse](RequestData requestData, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultHttpTransport`1.RequestAsync[TResponse](HttpMethod method, String path, PostData data, RequestParameters requestParameters, CancellationToken cancellationToken)
# Inner Exception: The JSON value could not be converted to System.Nullable`1[System.Boolean]. Path: $.read_only_allow_delete | LineNumber: 1 | BytePositionInLine: 44.
System.Text.Json.JsonException: The JSON value could not be converted to System.Nullable`1[System.Boolean]. Path: $.read_only_allow_delete | LineNumber: 1 | BytePositionInLine: 44.
 ---> System.InvalidOperationException: Cannot get the value of a token type 'String' as a boolean.
   at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_ExpectedBoolean(JsonTokenType tokenType)
   at System.Text.Json.Utf8JsonReader.GetBoolean()
   at System.Text.Json.Serialization.Converters.BooleanConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Converters.NullableConverter`1.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.IndexManagement.IndexSettingsConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/IndexManagement/IndexSettings.g.cs:line 63
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.IndexManagement.IndexSettingsConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/IndexManagement/IndexSettings.g.cs:line 129
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, TDictionary& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.Serialization.DictionaryResponseConverterFactory.ResolvableDictionaryResponseConverterInner`3.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/Serialization/DictionaryResponseConverter.cs:line 74
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.ContinueDeserialize[TValue](ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.ReadFromStreamAsync[TValue](Stream utf8Json, JsonTypeInfo jsonTypeInfo, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultResponseBuilder`1.SetBodyAsync[TResponse](ApiCallDetails details, RequestData requestData, Stream responseStream, String mimeType, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultResponseBuilder`1.ToResponseAsync[TResponse](RequestData requestData, Exception ex, Nullable`1 statusCode, Dictionary`2 headers, Stream responseStream, String mimeType, Int64 contentLength, IReadOnlyDictionary`2 threadPoolStats, IReadOnlyDictionary`2 tcpStats, CancellationToken cancellationToken)
   at Elastic.Transport.HttpTransportClient.RequestAsync[TResponse](RequestData requestData, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultRequestPipeline`1.CallProductEndpointAsync[TResponse](RequestData requestData, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultHttpTransport`1.RequestAsync[TResponse](HttpMethod method, String path, PostData data, RequestParameters requestParameters, CancellationToken cancellationToken)
# Exception:
Elastic.Transport.UnexpectedTransportException: The JSON value could not be converted to System.Nullable`1[System.Boolean]. Path: $.read_only_allow_delete | LineNumber: 1 | BytePositionInLine: 44.
 ---> System.Text.Json.JsonException: The JSON value could not be converted to System.Nullable`1[System.Boolean]. Path: $.read_only_allow_delete | LineNumber: 1 | BytePositionInLine: 44.
 ---> System.InvalidOperationException: Cannot get the value of a token type 'String' as a boolean.
   at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_ExpectedBoolean(JsonTokenType tokenType)
   at System.Text.Json.Utf8JsonReader.GetBoolean()
   at System.Text.Json.Serialization.Converters.BooleanConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Converters.NullableConverter`1.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.IndexManagement.IndexSettingsConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/IndexManagement/IndexSettings.g.cs:line 63
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.IndexManagement.IndexSettingsConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/_Generated/Types/IndexManagement/IndexSettings.g.cs:line 129
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, TDictionary& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.Read[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](Utf8JsonReader& reader, JsonSerializerOptions options)
   at Elastic.Clients.Elasticsearch.Serialization.DictionaryResponseConverterFactory.ResolvableDictionaryResponseConverterInner`3.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) in /_/src/Elastic.Clients.Elasticsearch/Serialization/DictionaryResponseConverter.cs:line 74
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, JsonTypeInfo jsonTypeInfo, ReadStack& state)
   at System.Text.Json.JsonSerializer.ContinueDeserialize[TValue](ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.ReadFromStreamAsync[TValue](Stream utf8Json, JsonTypeInfo jsonTypeInfo, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultResponseBuilder`1.SetBodyAsync[TResponse](ApiCallDetails details, RequestData requestData, Stream responseStream, String mimeType, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultResponseBuilder`1.ToResponseAsync[TResponse](RequestData requestData, Exception ex, Nullable`1 statusCode, Dictionary`2 headers, Stream responseStream, String mimeType, Int64 contentLength, IReadOnlyDictionary`2 threadPoolStats, IReadOnlyDictionary`2 tcpStats, CancellationToken cancellationToken)
   at Elastic.Transport.HttpTransportClient.RequestAsync[TResponse](RequestData requestData, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultRequestPipeline`1.CallProductEndpointAsync[TResponse](RequestData requestData, CancellationToken cancellationToken)
   at Elastic.Transport.DefaultHttpTransport`1.RequestAsync[TResponse](HttpMethod method, String path, PostData data, RequestParameters requestParameters, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at Elastic.Transport.DefaultHttpTransport`1.ThrowUnexpectedTransportException[TResponse](Exception killerException, List`1 seenExceptions, RequestData requestData, TResponse response, RequestPipeline pipeline)
   at Elastic.Transport.DefaultHttpTransport`1.RequestAsync[TResponse](HttpMethod method, String path, PostData data, RequestParameters requestParameters, CancellationToken cancellationToken)
   at Elastic.Clients.Elasticsearch.ElasticsearchClient.<>c__DisplayClass40_0`3.<<DoRequestAsync>g__SendRequest|0>d.MoveNext() in /_/src/Elastic.Clients.Elasticsearch/Client/ElasticsearchClient.cs:line 381
--- End of stack trace from previous location ---
   at <SNIP> in <SNIP>

[stevejgordon]

Thanks for reporting this @Sharparam. This looks like an issue with the specification used to generate the client. I'll get a PR in to fix the spec, and we can then regenerate the client in a future release.