Invalid media-type value on headers [Content-Type, Accept] on all calls in `v9.0.0`

[moh3nhadavi]

Hello,
I define my client as follows:

self.es = AsyncElasticsearch(
    cloud_id=config["cloud_id"],
    basic_auth=(
        config["username"],
        config["password"],
    ),
    http_compress=True,
    request_timeout=60,
)

Since I have installed the v9.0.0 version of Elasticsearch, I get

BadRequestError(400, 'media_type_header_exception', 'Invalid media-type value on headers [Content-Type, Accept]')

on all the requests. I also tried to add

{
    "Accept": "application/json",
    "Content-Type": "application/json"
}

in the header. But it didn't work.

Does anyone have any idea how to fix this bug?

[aymentil]

Hi,

Same problem for me it was working until 8.18.0 but after is not working anymore .

[miguelgrinberg]

@moh3nhadavi @aymentil What version of Elasticsearch are you running this against? We suspect this happens because you are using the 9.0.0 client to connect to a 8.x Elasticsearch server. Can you please confirm?

[moh3nhadavi]

@miguelgrinberg Hello, Thanks for replying.
I realized I have elastic-transport==8.17.1 and elasticsearch==9.0.0 installed. I checked on GitHub; there is an elastic-transport v9 on Git, but it has not been published on PyPI. Do you think this is the issue?

[miguelgrinberg]

@moh3nhadavi I need to know what server version you have. We have not released a 9.0 version of elastic-transport. The latest 8.x release should work just fine with ES 9. But you need to use a version 9 server. Can you confirm what version is your server please?

[moh3nhadavi]

@miguelgrinberg I got your point. Indeed, it is v8.13.4, not ES 9.

[miguelgrinberg]

@moh3nhadavi Okay, good. You will need to upgrade the client and the server to 9 at the same time, or else upgrade the server first and then the client. The 9.0 client does not offer compatibility with the 8.x or older servers.

[moh3nhadavi]

@miguelgrinberg Clear, Thanks