QUIC - Not sending full image content in response.


Active Member
The dreaded:
This occurs sometimes on 1st page load of a site, a number of the images will fail to load.

Looking in developer tools in Chrome we see the quic error. Which seemingly results in the full image data not being sent in response:

Response header says:
accept-ranges bytes
alt-svc quic=":443"; ma=2592000; v="35,37,38,39"
cache-control public, max-age=31536000
content-length 425391
content-type image/jpeg
date Wed, 31 Jan 2018 09:54:14 GMT
expires Thu, 31 Jan 2019 09:54:14 GMT
last-modified Tue, 30 Jan 2018 13:56:38 GMT
status 200
strict-transport-security max-age=31536000
x-content-type-options nosniff
x-frame-options sameorigin
The content actually returned is 0 bytes. This is confirmed by the server log:
<snip? - - [31/Jan/2018:09:42:26 +0000] "GET <snip>1372326053.jpg HTTP/1.1" 206 0 "https://<snip>/" "Mozilla/5.0 (Linux; Android 6.0.1; FP2 Build/FP2-gms-17.12.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.111 Mobile Safari/537.36"
Response is served to browser as:
We've also seen partial sends as well as 0 byte sends.

Looking in the error log we see nothing related to that request.

Version: 5.2.3 Build 7 Enterprise
OS: CentOS 6 64bit

Browsers: Chrome - Mobile and Desktop

Jon K

Staff member
Please try upgrading to 5.2.4 which was released yesterday. In the later builds of 5.2.3 we fixed multiple QUIC issues like you describe here.

You can upgrade with the following:
/usr/local/lsws/admin/misc/lsup.sh -f -v 5.2.4