This MDVA-12304 patch solves 503 errors on store fronts, with Unable to send the cookie. Maximum number of cookies would be exceeded. error message in logs. This is a known Magento Commerce 2.2.5 issue. This patch is available when the Magento Quality Patch (MQP) tool 1.0.12 is installed.
Affected products and versions
- The patch is created for Magento version:
Magento Commerce 2.2.5. - Compatible with Magento versions:
Magento Commerce Cloud and Magento Commerce, 2.x.x.
Note: the patch can be applicable to other versions. To check if the patch is compatible with your Magento version, run ./vendor/bin/magento-patches status.
Issue
Customers get a 503 error when navigating the store front. In the var/log/exception.log file there is the following error message Unable to send the cookie. Maximum number of cookies would be exceeded.
The issue occurs because the Magento default cookies limit is set to 50, and if the client's browser hits the limit, Magento throws an exception. The solution provided in the patch increases the cookie limit to 200.
Steps to reproduce:
The 503 error can display at any point when the customer is trying to login and visit his or her cart.
In the var/log/exception.log file there is the following error message Unable to send the cookie. Maximum number of cookies would be exceeded.
Actual result:
The customer cannot check their cart or complete their order.
Expected result:
The customer can check their cart and complete their order.
Apply the patch
For instructions on how to apply an MQP patch, use the following links depending on your Magento product:
- Magento Commerce: DevDocs Apply patches using Magento Quality Patches Tool.
- Magento Commerce Cloud: DevDocs Upgrades and Patches > Apply patches.
Related reading
To learn more about Magento Quality Patches, refer to:
- Magento Quality Patches released: a new tool to self-serve quality patches.
- Check if patch is available for your Magento issue using Magento Quality Patches.
For info about other patches available in MQP tool, refer to the Patches available in MQP tool section.