Issues with images and Amazon Cloudfront

Resolved VWI
(@r3born)

6 years, 6 months ago
I have a site running Litespeed 2.9.8.7 where I enabled Amazon Cloudfront CDN. It used to run fine for several months, but recently I noticed that there were severe issues with images – sometimes one image is randomly replaced by another, and very often they simply don’t load. Tried to troubleshoot this by enabling/disabling the CDN, but it doesn’t work. The only way to get the site display correctly is to disable Litespeed whatsoever.
I am now getting alerts from Google Search Console regarding usability issues. Can you help please?

Report number: BZVCKZQX
- This topic was modified 6 years, 6 months ago by VWI.

Viewing 12 replies - 1 through 12 (of 12 total)

stanley@litespeed
(@stanleylitespeed)

6 years, 6 months ago

Hi @r3born, you said Tried to troubleshoot this by enabling/disabling the CDN, Sounds like the Cloudfront does cache the image correctly, usually our plugin will not change the URL of your images. Could you verify does our plugin affected the Cloudfront caching?

Thread Starter VWI
(@r3born)

6 years, 6 months ago

Hello, how can I verify this?

Plugin Support qtwrk
(@qtwrk)

6 years, 6 months ago

Hi,

Tried to troubleshoot this by enabling/disabling the CDN, but it doesn’t work

You mean ， even with CDN off , the image still loaded with wrong link ?

If that so , could you please tell what was the original URL and wrongly-showing URL ?

Best regards,

Thread Starter VWI
(@r3born)

6 years, 6 months ago

With CDN off, the image loaded correctly BUT there are a lot of images on the page that returned 404 errors.

Plugin Support qtwrk
(@qtwrk)

6 years, 6 months ago

Hi,

Could you please provide an example URL of these 404 images and what is the correct URL that with LSCWP off ?

Also could you please confirm , that after you disabling/enabling CDN , you did purge all ?

because it may not come in effect unless you have purged cache.

Thread Starter VWI
(@r3born)

6 years, 6 months ago

I purged the cache more than 10 times.

Here’s an example:
https://vintagewatchinc.com/wp-content/uploads/2019/08/generation-2-shield-338×450.jpg
On this page: https://vintagewatchinc.com/ussr/vostok/nvch-30/

Right now the CDN is disabled. Issues I’m encountering are:
– generally slow loading for images
– images randomly throwing 404 errors (sometimes a refresh of the page fixes it, but this is not a good user experience)

Thread Starter VWI
(@r3born)

6 years, 6 months ago

Clicking on the image link directly obviously works, the image exists in the uploads folder.

Thread Starter VWI
(@r3born)

6 years, 6 months ago

I just ran some speed tests with webpagetest.org, something is seriously wrong:
– With Litespeed on (CDN off), loading time is 23 seconds
– With Litespeed totally disabled, loading time is 10 seconds

Plugin Support qtwrk
(@qtwrk)

6 years, 6 months ago

Hi,

So on this page https://vintagewatchinc.com/ussr/vostok/nvch-30/ , with image https://vintagewatchinc.com/wp-content/uploads/2019/08/generation-2-shield-338×450.jpg ,and this is the correct image URL.

Do you have record for what is the incorrect image URL that causes 404 error ?

with the 404 URL , we might guess something out for what may cause it or what possibly went wrong.

Also please enable advanced debug log to your IP

then access the page in quesiton , it will log every CDN URL rewrite in debug log , from there it could tell me why or what happened.

For webpagetest , could you please send the both test result with and without LSCWP ? we will check the report and see if we can tell why it slows down so much.

Best regards,

Thread Starter VWI
(@r3born)

6 years, 6 months ago

Here are the results from webpagetest:

Litespeed enabled:
https://www.webpagetest.org/result/191021_SM_83e3830a2043489332565eb411d79066/

Litespeed disabled:
https://www.webpagetest.org/result/191021_A4_3fff6ed9ba0bdf4e21a234ad3869fb17/

How can I email you the debug log?

stanley@litespeed
(@stanleylitespeed)

6 years, 6 months ago

Hi @r3born, the Litespeed enabled is a fresh load of the page, so the speed will be slower then disabled because our plugin is running some optimization function. If you want to test the cached result please pre-cache the page.

For example, this is the cached result: https://www.webpagetest.org/result/191022_H1_cc99165f2f42f3bba7d5747be25cb743/

Also, I find the image (generation-2-shield-338×450.jpg) has loaded on both versions of the webpagetest and I cannot reproduce the issue on your site now.

You can put the debug log on https://pastiebin.com and send us the link here.

Plugin Support LiteSpeed Lisa
(@lclarke)

6 years, 6 months ago

Hi @r3born,

Do you still need help with this? If so, please provide the debug log, as requested.

I’m going to mark this topic “Resolved” for now, but will be happy to re-open it if we hear from you again.

Thanks!