Title: Constant POST 404 Errors causing CPU Usage Spike Last modified: October 30, 2024 --- # Constant POST 404 Errors causing CPU Usage Spike * Resolved [Wes Butler](https://wordpress.org/support/users/wesb2023/) * (@wesb2023) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/) * Hello, we are experiencing similar issues mentioned in this post: [https://wordpress.org/support/topic/plugin-spawns-post-requests-constantly/](https://wordpress.org/support/topic/plugin-spawns-post-requests-constantly/) * These constant POST requests are causing 404 errors in the logs and the CPU on the host server is being held constantly at 100%. This is causing extremely slow load times on this site, and others that are being hosted on this server. We have tried removing the plugin, and disconnecting the site in Mailchimp settings, but these errors continue to occur and we have no idea why, and no idea how to make them stop. Please advise, thank you. - This topic was modified 1 year, 7 months ago by [Wes Butler](https://wordpress.org/support/users/wesb2023/). * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fconstant-post-404-errors-causing-cpu-usage-spike%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 7 replies - 1 through 7 (of 7 total) * Plugin Author [ryanhungate](https://wordpress.org/support/users/ryanhungate/) * (@ryanhungate) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18106019) * [@wesb2023](https://wordpress.org/support/users/wesb2023/) These hooks are now“ invalid” so it’s not a big deal, but for the record please don’t post the full URL’s here because that has your auth token in there… the issue is coming from too many webhooks that are connected to your list. This happens when deleting and re-adding the plugin. * The best thing you can do here is to delete all the hooks that are associated with your list while logged into your Mailchimp account. This should be really easy to do and then the post requests will stop coming over. * The other thing to note, is that this is designed to keep things in sync, so if possible, if you could delete all those hooks, and then enable the “support” option in the plugin, we will be able to turn this back on for you on 1 webhook, not too many like you’re seeing right now. * Let us know if you have any other questions at all about this. * Thread Starter [Wes Butler](https://wordpress.org/support/users/wesb2023/) * (@wesb2023) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18106030) * My apologies for including the full url, I’ve removed that. I’m in the process of removing the excess webhooks from the mailchimp account; there are dozens. Thank you so much for your quick response. I will advise when I have the “support” option enabled. * Thread Starter [Wes Butler](https://wordpress.org/support/users/wesb2023/) * (@wesb2023) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18107408) * [@ryanhungate](https://wordpress.org/support/users/ryanhungate/) Thank you again for your help. The POST requests stopped yesterday after removing all the webhooks. I’ve enabled the “Support” option in the Mailchimp for WooCommerce Plugin and have initiated a sync back with Mailchimp. If you have time, we’d appreciate your team taking a look to make sure we have things set up correctly. * Plugin Author [ryanhungate](https://wordpress.org/support/users/ryanhungate/) * (@ryanhungate) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18107424) * ok great [@wesb2023](https://wordpress.org/support/users/wesb2023/) – things look like they’re syncing right now, so once that’s done we’ll make sure your webhooks are enabled. We will keep an eye on your status in our support tool so please don’t disable that just yet 🙂 * Thread Starter [Wes Butler](https://wordpress.org/support/users/wesb2023/) * (@wesb2023) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18109946) * [@ryanhungate](https://wordpress.org/support/users/ryanhungate/) I believe the syncing has finished. Please let me know if the webhooks look correct, and then I can mark this resolved. Thank you again for you and your team’s help! * Plugin Author [ryanhungate](https://wordpress.org/support/users/ryanhungate/) * (@ryanhungate) * [1 year, 7 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18109998) * [@wesb2023](https://wordpress.org/support/users/wesb2023/) by chance are you using caches that might be impacting the rest API routes? If so would you so kindly add an exclusion for anything coming to our plugin? `mailchimp-for-woocommerce` can be used with a wildcard. * Plugin Support [KJ](https://wordpress.org/support/users/kjvextras/) * (@kjvextras) * [1 year, 6 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18133775) * hi [@wesb2023](https://wordpress.org/support/users/wesb2023/) circling back around. * Glad to hear that fixed the issue! If anything else pops up, don’t hesitate to reach back out to us. We appreciate you using the plugin. * If you’re happy with this integration, please consider leaving a [5-star review](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/reviews/). Your feedback helps other WooCommerce customers find this integration and helps support future development. Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Constant POST 404 Errors causing CPU Usage Spike’ is closed to new replies. * ![](https://ps.w.org/mailchimp-for-woocommerce/assets/icon-256x256.png?rev=1509501) * [Mailchimp for WooCommerce](https://wordpress.org/plugins/mailchimp-for-woocommerce/) * [Frequently Asked Questions](https://wordpress.org/plugins/mailchimp-for-woocommerce/#faq) * [Support Threads](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/) * [Active Topics](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/unresolved/) * [Reviews](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/reviews/) * 8 replies * 3 participants * Last reply from: [KJ](https://wordpress.org/support/users/kjvextras/) * Last activity: [1 year, 6 months ago](https://wordpress.org/support/topic/constant-post-404-errors-causing-cpu-usage-spike/#post-18133775) * Status: resolved