Questions[tornado](server)

I'm running a Tornado web server that only accepts SSL connections, and only listens on port 443. Connecting to it in a browser over HTTPS works well.

I'm seeing messages like this in my logs:

ERROR [tornado.general] Uncaught exception
[...]
  File "/usr/lib/python3.4/ssl.py", line 828, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:600)
WARNI [tornado.access] 405 OPTIONS / (<some IP>) 0.57ms

I'm not sure if the warning is related to the error (I need to add time stamps to the logs). The requests don't come in quickly which makes me think it's not an attack; on the other hand, they are coming from many places over the world, and this is a site that not many people should know about.

If I try it myself by going to http://my-site:443 I get the same exception, without the warning, plus an additional line:

WARNI [tornado.general] SSL Error on 18 ('<my IP>', <port>): [SSL: HTTP_REQUEST] http request (_ssl.c:600)

Is something using the wrong protocol to connect to the HTTPS port?

I am using Tornado for a small blog which may get around 500-1k visits / day , is it ok to use tornado without any proxy in front of it ?

We are facing a problem with inconsistent 502 errors and tracking down the reasons has been a very frustrating exercise. We can reproduce the problem by sending several simultaneous requests quickly. The problem is that several is only in the range of 10 to 20 within a 5 seconds (not a typo). So clearly this type of load should be handled easily.

We really like the Nginx + Tornado approach but are considering going to a more traditional (e.g. threading) approach because this problem has been very difficult to solve. I was wondering if you a) know how to fix this issue and b) how we can tracked down the culprit(s).

The log files simply identify there being a connection refused. We have the same problem as this post: https://stackoverflow.com/questions/2962439/how-do-i-debug-a-http-502-error

But there is no answer provided on how to solve the problem so I'm hoping you can help because this may be a common issue with this type of setup.

Thanks in advance,

Paul

I googled and found a hint that I should set debug mode in Tornado so that it could reload files automatically on update. But I didn't find an exact string to insert. I tried different combinations similar to this application.settings = {"Debug": True} but it doesn't help.

I'm trying to set up a HTTP streaming server I wrote with Tornado and python. Basically, it keeps the connection alive and occasionally flushes information out. It's a bit like long polling, except the connection isn't broken by the server.

Is it possible to put something like this behind nginx? I'm testing it from my browser, and I can't see any output until the server breaks the connection, then it's all sent at once.