On 26 Aug, 08:33 am, maillists@ivsn.com wrote:

Hello, I get very often this output (application is using Twisted 8.2.0

• Nevow-0.9.33):

  Unhandled error in Deferred: Traceback (most recent call last): Failure: nevow.athena.ConnectionLost: Timeout

But I can't find out, where and how to handle it. In most cases it happen, when users leave the site or close the browser, so I'd like to suppress this messages, because they only blow up the logs without real value for debugging.

Can you give me some hints, please?

It's really hard to tell what that error indicates. *One* thing it definitely indicates, though, is that somewhere in your application a Deferred was created and not given an errback. If you give it an errback, then you can handle it. Enabling Deferred debugging (twistd --debug) may help you learn where it was created.

Jean-Paul