Problem with caching of mini-cart and FastCGI

tsviel 2021-02-02 14:09:26 UTC #1

Keywords: WordPress + NGINX + SSL - Google Cloud Platform - Technical issue - Other
bnsupport ID: c8bd2e9a-efcf-9f34-771b-313c25676495
Description:
Hey,
I am running a woocommerce eCommerce on Wordpress.
It seems that new visitors getting a problem when adding things to the ajax cart.
The cart becomes empty as soon as they go to another page.

I am not running any Cache plugin, but I know that FastCGI is enabled on this instance.
I know for certain that the following cookies and URLs should be exempted:
wp_woocommerce_session_
woocommerce_items_in_cart
woocommerce_cart_hash
/cart
/order-info
but I don't know what to do and how to put those exceptions for FastCGI.
Please help

michiel 2021-02-03 06:49:45 UTC #2

Hi @tsviel,

There are many errors in the nginx error log like this one:

2021/01/31 08:32:28 [error] 1274#0: *180840 FastCGI sent in stderr: "PHP message: The WC_Cart->tax_display_cart argument is deprecated since version 4.4. Use WC_Cart->get_tax_price_display_mode() instead.PHP message: The WC_Cart->tax_display_cart argument is deprecated since version 4.4. Use WC_Cart->get_tax_price_display_mode() instead" while reading response header from upstream, client: 176.12.202.134, server: localhost, request: "POST /?wc-ajax=add_to_cart HTTP/1.1", upstream: "fastcgi://unix:/opt/bitnami/php/var/run/www.sock:", host: "www.*******", referrer: "https://www.******/%D7%9E%D7%97%D7%9C%D7%A7%D7%94/%d7%99%d7%a8%d7%a7-%d7%95%d7%9e%d7%99%d7%95%d7%97%d7%93%d7%99%d7%9d/"

Are you using the latest Woocommerce version? Some of the plugin's code seems to be deprecated. I found more information here:

https://wordpress.org/support/topic/deprecated-wc_cart-tax_display_cart/

Could you ask in the WordPress forum? It does not seem to be related to the Bitnami configuration.

Regards,
Michiel

tsviel 2021-02-03 07:20:37 UTC #3

I don't see how it is related. I had tried to install the website on an apache server which does not include a cache system, and it seems to work fine there. For some reason it happens only on hosting which has cache service in the backend, and also it only happens for part of the visitors. I guess if it was a programmatic problem, it would occur to every user, but it only happens for some new visitors.

Anyway, I had tried to disable all plugins, made sure woocommerce is updated and left only woocommerce, elementor, and hello elementor theme activated and updated, and yet for some reason, part of the users get this problem.

How can I add exceptions for cache by cookies and URL in the Fast CGI configuration?

michiel 2021-02-03 12:44:48 UTC #4

Hi @tsviel,

The following guide shows how you can blacklist directories and files for php-fpm. Can you check if it works? You can find the php-fpm configuration file here: "/opt/bitnami/php/etc/php-fpm.conf"

https://en.code-bude.net/2017/02/11/how-to-disable-php-opcache-for-certain-directories/

Best regards,
Michiel

tsviel 2021-02-03 14:29:05 UTC #5

I can't start the PHP-fpm after applying this.
Also, it does not solve my problem since my cart is using AJAX, and it seems the ajax request\cookie related to it is cached.
which directory should I blacklist? the entire theme folder? or just the Elementor plugin?

michiel 2021-02-04 13:00:42 UTC #6

Hi @tsviel,

I'm afraid this issue exceeds the scope of this forum as the issue seems due to the plugin itself. I recommend posting your question in the WordPress or Woocommerce community forum, where they will be able to help you with configuring the plugin to work correctly when caching is enabled.

Best regards,
Michiel

system 2021-02-18 13:00:53 UTC #7

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.

Bitnami provides free all-in-one installers, virtual machines and cloud images for popular open source applications. Get them now!