simple_httpclient: Timeout after redirect not raised properly

Hello,
My test codes are below:

import traceback
from tornado import httpclient

def test():
client = httpclient.HTTPClient()
url = "http://www.baidu.com/link?url=7rwodBCaetm-ogDMm0fCdkj-Crje0M21LIWnXbz3XxToow8VmZwXOZaEz1nBMJBKofatc2X8SlFXyNvv5D7HhWgpIB8MDi5R85IYL30OjDmW4URWPW5y4AIwkVKioJSxPPBzWJmmaO11fEEO__BLxIiiT1FcKw8asqqF7h1QupS"
try:
response = client.fetch(url)
print(response)
except:
traceback.print_exc()

if name == "main":
test()

It is suspended after got tornado.simple_httpclient.HTTPTimeoutError. The stack trace is

ERROR:asyncio:Exception in callback _HTTPConnection.finish..() at /home/python3/.miniconda3/lib/python3.8/site-packages/tornado/simple_httpclient.py:664
handle: <Handle _HTTPConnection.finish..() at /home/python3/.miniconda3/lib/python3.8/site-packages/tornado/simple_httpclient.py:664>
Traceback (most recent call last):
File "/home/python3/.miniconda3/lib/python3.8/asyncio/events.py", line 81, in _run
self._context.run(self._callback, *self._args)
File "/home/python3/.miniconda3/lib/python3.8/site-packages/tornado/simple_httpclient.py", line 664, in
fut.add_done_callback(lambda f: final_callback(f.result()))
tornado.simple_httpclient.HTTPTimeoutError: Timeout during request

How to fix it?
Thanks!

Python 3.8.5
Tornado 6.1

Try to run it several times to get above error

Start by reproducing the redirect timeout with HTTPClient.fetch and the URL from the report. Then inspect simple_httpclient.py around line 664, where the stack trace shows the callback failure. Done means a timeout after a redirect raises cleanly without leaving the client suspended.