strange "Timeout during request" error with this url

Using the simple httpclient, this code fails:

from tornado.httpclient import AsyncHTTPClient, HTTPRequest

async def test():
  req = HTTPRequest(
    'https://jmeter-plugins.org/get/',
  )
  response = await AsyncHTTPClient().fetch(req)
  print(response.headers)

if __name__ == '__main__':
  import asyncio
  asyncio.run(test())

tornado.simple_httpclient.HTTPTimeoutError: Timeout during request

but using the curl one it runs without issues.

The response has been received and the connection has been closed, but it seems that Tornado doesn't notice that.

Start with the provided AsyncHTTPClient and simple_httpclient reproducer for https://jmeter-plugins.org/get/, then compare its behavior with the curl client. Trace how the response and connection closure are handled after the response is received. Done means the simple client completes this request without raising HTTPTimeoutError.