Error Code 803: Incomplete HTTP Response Received

[EdLongley]

On 5 pages on our site we've got an Error Code 803: Incomplete HTTP Response Received.

We checked the network interface within the browser inspector, which did not return any errors, this would mean than there were no issues with retrieving resources from the server. In the console log there are no errors also.

We also inspected the URL bar settings and can see each page is loaded under a secure connection with no errors.

When using http://www.webconfs.com/http-header-check.php there was a "HTTP/1.1 301 Moved Permanently" issue.

A little in the dark on what to do next. Any help would be amazing!

[moz_support]

-- update: the new Moz Pro site crawler is now live, this means we can now crawl your SNI site. If you have any queries please check this post on fixing 803 errors, or reach out to help@moz.com --

Hey there!

Patrick linked to a really helpful Q&A article, but the other big cause for an 803 error would be SNI (Server Name Indication). Unfortunately I don't see the actual domain included in your question, so it's hard to be sure, but that's usually the prime suspect. Our current site crawler does not support SNI and if that is in use on your site, we will have trouble crawling it.

The good news is that we have begun to develop a new crawler that supports SNI, which is currently in beta. If you're interested in being a part of the beta testing, you can head here to sign up: http://goo.gl/forms/LCvL9Ix8JDHfbAvr1

I hope that helps! Feel free to reach out to us at help@moz.com if you want to discuss these errors in greater detail on a non-public forum.

[PatrickDelehanty]

Hi there

There was a great answer from Sha Menz in this Moz Q+A here. Hope this helps!

Good luck!
Patrick