newrelic-tornado6.py

# Run the server with:
# $> newrelic-admin run-python newrelic-tornado6.py --logging=debug
# Hit the server with:
# $> curl http://localhost:8888/
# Note the error in the server logs

import tornado.httpclient

import tornado.ioloop
from tornado.options import parse_command_line
import tornado.web


# URL that returns a redirect code, e.g. 302
url = "http://httpbin.org/redirect-to?url=http%3A%2F%2Fwww.google.com&status_code=302"


class MainHandler(tornado.web.RequestHandler):
    async def get(self):
        c = tornado.httpclient.AsyncHTTPClient()
        r = await c.fetch(url)
        self.write(r.body)


if __name__ == "__main__":
    parse_command_line()
    application = tornado.web.Application([
        (r"/", MainHandler),
    ], debug=True)
    application.listen(8888)
    tornado.ioloop.IOLoop.current().start()

Snippet to reproduce https://support.newrelic.com/tickets/367805/edit