Magento error on add to cart configurable product after upgrade to 1.9.1.0

Question

after update the store from 1.8.1 to 1.9.1.0, when i add to cart a configurable product and i logged in, the system return the page 503.

The same operation, but if not logged in work correctly. The system.log and exception.log don't report an error related to this issue.

Our hosting provider, believe this error is caused by a bug in PHP/Zend framework. We have tried with PHP 5.5 as well with same results so at this point there is not much more we can do.

A bug report has been submitted: https://bugs.php.net/bug.php?id=68958

all suggestions are much appreciated.

Answer 1

I had a similar issue with configurable products (not 503 error but infinite loop) after upgrading from 1.6.2 to 1.9.1 As @ladle3000 suggests it was also related to shopping cart rules that had a condition related to a category. If I deactivated or deleted the rules, no more issues.

Check out the changes I did here: "Please specify the product's option(s)." after magento upgrade 1.6.2 to 1.9.1 It fixed my issue

There is also more about this Magento 1.9.1 bug here: Magento debug trace

Answer 2

I know the answer. For our store the situation arose from an old shopping cart rule. It seems there is some issue with old rules that use certain conditions in which an infinite loop is caused. Such as name contains, etc.

It sounds like this is your issue too, because probably you have a rule that only applies to certain groups.

Hope it helps, I got a lot of stress over this issue.

Answer 3

Experienced the same issue. 503 error when adding configurable products to cart after upgrade from 1.9.0.1 to 1.9.1.0. Disabling an old shopping cart price rule fixed the issue.