### Elasticsearch Version

8.2.0

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

docker-image = docker.elastic.co/elasticsearch/elasticsearch:8.2.0

### Problem Description

We are trying to migrate from Elasticsearch 6.7.1 to Elasticsearch 8.2.0.

With the same amount of documents per bulk request (100 docs per request), we always get a socket timeout in Elasticsearch 8.2.0. Everything works fine in Elasticsearch 6.7.1.

I noticed that indexing the same document in Elasticsearch 8.2.0 takes 44152ms. In Elasticsearch 6.7.1, indexing takes 50ms.

### Steps to Reproduce

[elasticsearch_8.2.0.txt](https://github.com/elastic/elasticsearch/files/8754299/elasticsearch_8.2.0.txt)
[elasticsearch_6.7.1.txt](https://github.com/elastic/elasticsearch/files/8754300/elasticsearch_6.7.1.txt)



### Logs (if relevant)

_No response_
server/src/main/java/org/elasticsearch/index/mapper/DocumentParser.java
break;
                case START_OBJECT:
                    parseObject(context, mapper, currentFieldName);
                    break;
                case START_ARRAY:
                    parseArray(context, mapper, currentFieldName);
                    break;
                case VALUE_NULL:
                    parseNullValue(context, mapper, currentFieldName);
                    break;
                default:
                    if (token.isValue()) {
                        parseValue(context, mapper, currentFieldName, token);
                    }
                    break;
            }
            token = context.parser().nextToken();
        }
    }
    private static void throwFieldNameBlank(DocumentParserContext context, String currentFieldName) {
        throw new MapperParsingException(
            "Field name cannot contain only whitespace: [" + context.path().pathAsText(currentFieldName) + "]"
        );
    }
    private static void throwEOF(ObjectMapper mapper, String currentFieldName) {
        throw new MapperParsingException(
            "object mapping for ["
                + mapper.name()
                + "] tried to parse field ["
                + currentFieldName