White screen on product and cart pages

[mipapage]

Hi there,

 

We're on PS 1.5 and at some point this weekend our website began throwing up "white screen" errors on product and cart pages. We had a client email us about it :/

 

Here is a sample

 

I have turned off Google pagespeed, turned on error reporting (cloaked to my IP address) and confirmed that error reporting was also already on in PHP.ini. Smarty caching has been turned off, as has APC while I try and sort this out.

 

Any help? I'm not seeing any errors on these pages (I do see some unimportant warning on other pages) nor is there anything special in the apache logs.

 

If you open the developer tools in Chrome on that link above, you will see that the page returns a status of 200, but there is no html :/

 

Thanks in advance for any help!

Edited November 30, 2014 by mipapage (see edit history)

[mipapage]

Okay, in Advanced Parameters  > Performance the Debug mode I turned off all of the non-prestashop mods and this seemed to get the product pages up and running again. Now for the cart...

[vekia]

but it's more than workaround, not a solution

if you want to find solution and have additonal features (not developed by prestashop)

try to turn on error reporting

 

prestashop max v1.5.3

open file: config/config.inc.php

find this line: @ini_set('display_errors', 'off');

change to look like this: @ini_set('display_errors', 'on');

 

 

 

prestashop above v1.5.3

open: config/defines.inc.php

 

find this line: define('_PS_MODE_DEV_', false);

change to look like this: define('_PS_MODE_DEV_', true);

http://cart-help.com/topic/60-error-reporting-prestashop-16-15-14-13/

 

 

 

then try to reproduce "white page"

you will see what exactly doesnt work.

it's a first step i debug process.

[mipapage]

Hi Vekia, thanks for your time! As indicated in my original post, error reporting is on, but the white screen remains:

 

 

 

I have turned off Google pagespeed, turned on error reporting (cloaked to my IP address) and confirmed that error reporting was also already on in PHP.ini. Smarty caching has been turned off, as has APC while I try and sort this out.

 

At some point I turned off the overrides as well and everything began to work. 

 

So time to work backwards. I removed some modules that we weren't using, activated the necessary 3rd party mods, and then things began to work again as the site was before.

 

I would love to know why there were no errors on those pages. As in my quote above, I was seeing other issues on other pages (warnings) but just white on product and cart pages.

 

Anyways, it is all working now, and we will upgrading to 1.6 and the default theme soon...