UNIXy Varnish

[Tom.]

I've recently started having strange problems with ProcessWire on my host. Things not saving, not updating. Various other problems. The problems seemed to be due to caching, as if I saved the page, did a hard refresh, then visited the page I edited, did a hard refresh. It would work. Otherwise data would get corrupted. 

After questioning my hosting about Caching. They informed me that they have recently installed UNIXy Varnish to help with page load times. Great idea in concept, however it was quite confusing for me. 

Luckily there is a way to disable this in cPanel, however I would like to bring it to peoples attention as it's appearance does come across as a ProcessWire bug.

[LostKobrakai]

It a really strange move of a hoster to enable caching without explicit user-consent. Without knowledge of the applications running on their systems this is more or less expected to cause serious troubles. Also – this might be nitpicking – but it's not a bug in pw if the server's caching mechanism is returning outdated content.

[Tom.]

It a really strange move of a hoster to enable caching without explicit user-consent. Without knowledge of the applications running on their systems this is more or less expected to cause serious troubles. Also – this might be nitpicking – but it's not a bug in pw if the server's caching mechanism is returning outdated content.

Exactly my thoughts, as I mentioned, I fully understand it's not a bug. 

It was strange for me because I updated to 3.0.21 just about the time they rolled this out. I tried to crop images and it would corrupt the image. Naturally as I wasn't informed of this caching I thought it was a bug. 

This post is purely for people who may experience this in future. However, I think this maybe a rare case as you mentioned. I would full expect a host to inform me when changes are done like that.