401 Unauthorized exception marked as JsonParsingException

[Ayush1gupta]

Java API client version

8.5.2

Java version

11

Elasticsearch Version

8.5.2

Problem description

When indexing a document the api, 401 unauthorized exception is marked as JsonParsingException which hides the actual error.

Error message
Caused by: jakarta.json.stream.JsonParsingException: Jackson exception: Unexpected character ('<' (code 60)): expected a valid value (JSON String, Number, Array, Object or token 'null', 'true' or 'false')

Steps to reproduce.
Setup a client with wrong password and index a document.

Full stack trace
Caused by: jakarta.json.stream.JsonParsingException: Jackson exception: Unexpected character ('<' (code 60)): expected a valid value (JSON String, Number, Array, Object or token 'null', 'true' or 'false') at [Source: (ByteArrayInputStream); line: 1, column: 2] at co.elastic.clients.json.jackson.JacksonJsonpParser.convertException(JacksonJsonpParser.java:84) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.json.jackson.JacksonJsonpParser.fetchNextToken(JacksonJsonpParser.java:91) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.json.jackson.JacksonJsonpParser.next(JacksonJsonpParser.java:118) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:70) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:79) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:43) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.transport.rest_client.RestClientTransport.getHighLevelResponse(RestClientTransport.java:280) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.transport.rest_client.RestClientTransport.performRequest(RestClientTransport.java:148) ~[elasticsearch-java-8.5.2.jar:?] at co.elastic.clients.elasticsearch.ElasticsearchClient.index(ElasticsearchClient.java:962) ~[elasticsearch-java-8.5.2.jar:?]

[swallez]

The parsing error indicates that the response is most probably XML. Is it produced by an intermediate authenticating proxy?

#579 fixes exception parsing so that this situation will result in a TransportException that wraps a lower level ResponseException that contains the full http response.