Hi,

We have a little module, which logs all 404 errors happening on our site and everyday I see a couple 404 on working images logged.
I never could reproduce, but still, I regularly see such errors in the logs: at least once a day, one of our images won't be found and served to a end-user.

Here's a sample link which threw a 404 earlier today: http://www.softfluent.com/images/pictures/office_small.png
And another one which threw a 404 yesterday: http://www.softfluent.com/images/screenshots/codefluent-entities.png

We're running Sitefinity 4.2, and I was wondering if you have ever heard of this problem?

Regards,
Carl

Hi Carl,

The 404 could be thrown by different means, but to better determine it is best if you can show me an error log for the 404 that will contain more specific information. Maybe when the error was thrown the image was unpublished, the library edited or url was changed and at that time there was a request to already cached content that pointed to the already updated image url or other property.
Another cause is if the error in the log files (App_Data/Sitefinity/Logs) "the remote host has closed the connection" this means the user has closed the browser after requesting the image.

Regards,
Stanislav Velikov
the Telerik team

Hi,

We are absolutely sure:
 - The image wasn't unpublished, moved, changed edited in anyway at the time the error was raised,
 - The library wasn't changed, moved, edited etc.

No error logs matching the 404.
Here's all the information I have:

Hi Carl,

Since there is no log for th error I can`t pinpoint the exact cause for this. Sitefinity will return 404 for an image in libraries only when its unpublished, changed url. If you happen to find a way to reproduce the error a log file should be created for all backend and frontend exceptions. Excuse me I am unable to provide much help here.

Best wishes,
Stanislav Velikov
the Telerik team

We've been having the same problem. Everything is long since published... more recently, we have a SEO company changing our URLs, but I don't think that's what you mean by changing URLs...or is it?

The problem existed well before the SEO company had access to our system.

I can look at a page, and see the image, whereas my colleague can look at the same page (at the same time, or not) and not see it. It's been quite a mystery.

I've attached our error.log.

We've been having the same problem. Everything is long since published... more recently, we have a SEO company changing our URLs, but I don't think that's what you mean by changing URLs...or is it?

The problem existed well before the SEO company had access to our system.

I can look at a page, and see the image, whereas my colleague can look at the same page (at the same time, or not) and not see it. It's been quite a mystery.

I've attached our error.log.