{"id":5076,"date":"2026-10-31T11:10:05","date_gmt":"2026-10-31T11:10:05","guid":{"rendered":"https:\/\/zynoo.com\/blog\/?p=5076"},"modified":"2026-11-01T11:22:19","modified_gmt":"2026-11-01T11:22:19","slug":"504-gateway-timeout","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/504-gateway-timeout\/","title":{"rendered":"How to Fix 504 Gateway Timeout Error (7 Fixes)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" id=\"h-\">A <strong>504 Gateway Timeout<\/strong> error occurs when a server acting as a gateway or proxy doesn&#8217;t receive a response from another server in time. It commonly happens when a website&#8217;s backend application is slow, overloaded, or experiencing connectivity problems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re visiting a website, try refreshing the page after a short interval. If you manage the website, start by checking your server and application logs to identify where the delay occurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here are seven practical ways to troubleshoot the error.<\/p>\n\n\n\n<h2 id=\"h-what-causes-a-504-gateway-timeout-error\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Causes_a_504_Gateway_Timeout_Error\"><\/span>What Causes a 504 Gateway Timeout Error?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many websites use multiple servers or services to handle requests.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, a browser may connect to Nginx or a CDN, which then forwards the request to an application server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If that application takes too long to respond, the gateway may return a 504 error instead of the requested page.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Overloaded or unresponsive application servers.<\/li>\n\n\n\n<li>Slow database queries or external API requests.<\/li>\n\n\n\n<li>Insufficient CPU, RAM, or application workers.<\/li>\n\n\n\n<li>Network problems between the gateway and backend.<\/li>\n\n\n\n<li>Proxy or application timeout limits.<\/li>\n\n\n\n<li>Misconfigured CDN or hosting infrastructure.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A 504 error is usually a server-side problem, although connection-specific issues can sometimes affect individual visitors.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/What-Causes-a-504-Gateway-Timeout-Error-1024x576.webp\" alt=\"What Causes a 504 Gateway Timeout Error\" class=\"wp-image-5084\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/What-Causes-a-504-Gateway-Timeout-Error-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/What-Causes-a-504-Gateway-Timeout-Error-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/What-Causes-a-504-Gateway-Timeout-Error-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/What-Causes-a-504-Gateway-Timeout-Error-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/What-Causes-a-504-Gateway-Timeout-Error.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 id=\"h-1-refresh-the-website-and-check-its-availability\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Refresh_the_Website_and_Check_Its_Availability\"><\/span>1. Refresh the Website and Check Its Availability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re simply visiting a website, wait briefly and refresh the page.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Temporary server overload or an interrupted backend request may resolve without intervention.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can also try another browser or network to see whether the problem is specific to your connection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the error affects everyone, the website owner or hosting provider will generally need to investigate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Avoid repeatedly submitting payments, orders, or forms.<\/strong> A backend operation may have completed even if the gateway timed out before returning its response.<\/p>\n\n\n\n<h2 id=\"h-2-check-server-and-application-logs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Check_Server_and_Application_Logs\"><\/span>2. Check Server and Application Logs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you manage the server, log files are the best place to start.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For Nginx, check the error log:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo tail -n 50 \/var\/log\/nginx\/error.log<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Look for messages similar to:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>upstream timed out (110: Connection timed out)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This indicates that Nginx waited too long for an upstream operation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Next, check the application logs to determine why the backend responded slowly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can also inspect a systemd-managed service:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo journalctl -u myapp -n 50<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Replace <code>myapp<\/code> with your actual service name.<\/p>\n\n\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>If you haven&#8217;t used SSH before<\/strong>, our <a href=\"https:\/\/zynoo.com\/blog\/ssh-commands\/\">SSH commands beginner&#8217;s guide<\/a> explains how to connect to a Linux server.<\/p>\n<\/div>\n\n\n\n<h2 id=\"h-3-check-cpu-ram-and-disk-usage\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Check_CPU_RAM_and_Disk_Usage\"><\/span>3. Check CPU, RAM, and Disk Usage<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A busy server may struggle to process requests within the gateway&#8217;s timeout period.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check memory:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Check disk space:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Monitor processes:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>top<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Look for sustained resource pressure, exhausted memory, full filesystems, or unusually busy processes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These results don&#8217;t automatically prove why the request timed out, but they can help identify performance bottlenecks.<\/p>\n\n\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>Our guide to<\/strong> <a href=\"https:\/\/zynoo.com\/blog\/linux-commands-for-server-management\/\">essential Linux commands for server management<\/a> covers additional commands for checking processes, services, and logs.<\/p>\n<\/div>\n\n\n\n<h2 id=\"h-4-investigate-nginx-and-upstream-timeouts\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Investigate_Nginx_and_Upstream_Timeouts\"><\/span>4. Investigate Nginx and Upstream Timeouts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If Nginx acts as your reverse proxy, check whether the upstream application responds within the configured timeout limits.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For HTTP backends, a configuration may include:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>location \/ {\n    proxy_pass http:\/\/127.0.0.1:3000;\n    proxy_read_timeout 60s;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The <code>proxy_read_timeout<\/code> setting controls how long Nginx waits between successive reads from the backend, not the total duration of the entire request.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before increasing it, test the backend directly:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>curl --max-time 15 -i http:\/\/127.0.0.1:3000\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Replace the address with your application&#8217;s actual endpoint. Some application routes may require authentication or return a valid response other than HTTP 200.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the application itself is slow, increasing Nginx&#8217;s timeout may only hide the underlying problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When a longer timeout is genuinely justified, review the application&#8217;s timeout settings too. PHP-FPM and FastCGI-based applications use different Nginx directives from HTTP proxy backends.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After configuration changes, validate Nginx before reloading:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo nginx -t\nsudo systemctl reload nginx<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Only reload if the configuration test succeeds.<\/p>\n\n\n\n<h2 id=\"h-5-check-cloudflare-or-your-cdn\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Check_Cloudflare_or_Your_CDN\"><\/span>5. Check Cloudflare or Your CDN<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If your website uses Cloudflare or another content delivery network, determine whether the timeout originates at the CDN or your origin server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check your <a href=\"https:\/\/en.wikipedia.org\/wiki\/Content_delivery_network\">CDN<\/a>&#8216;s error information and compare it with your origin server logs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 504 may come from an upstream service behind your origin server, or from another layer in the request path.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cloudflare has its own connection and response timeout behavior, so increasing an Nginx setting won&#8217;t necessarily override a CDN-imposed limit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Avoid disabling security or caching features without identifying the source of the timeout.<\/p>\n\n\n\n<h2 id=\"h-6-investigate-slow-database-queries-and-external-apis\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Investigate_Slow_Database_Queries_and_External_APIs\"><\/span>6. Investigate Slow Database Queries and External APIs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sometimes the web server is healthy, but the application is waiting on another service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common examples include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A database query that takes too long.<\/li>\n\n\n\n<li>An external API responding slowly.<\/li>\n\n\n\n<li>Exhausted application worker pools.<\/li>\n\n\n\n<li>Background jobs competing for resources.<\/li>\n\n\n\n<li>Database locks delaying requests.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Review application logs, slow-query logs, and service metrics to identify the delay.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If a database query is responsible, investigate indexing, query execution plans, and connection usage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For external API calls, configure reasonable timeouts and error handling. Long-running jobs may be better handled asynchronously when the application supports it.<\/p>\n\n\n\n<h2 id=\"h-7-contact-your-hosting-provider\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Contact_Your_Hosting_Provider\"><\/span>7. Contact Your Hosting Provider<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you can&#8217;t resolve the 504 Gateway Timeout error, contact your hosting provider with the evidence you&#8217;ve collected.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Include the affected domain, when the problem started, whether it happens intermittently, and any relevant log messages.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mention recent changes to your application, database, CDN, or reverse proxy configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A hosting provider can help investigate resource restrictions and infrastructure problems outside your administrative access.<\/p>\n\n\n\n<h2 id=\"h-502-vs-504-gateway-errors-what-s-the-difference\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"502_vs_504_Gateway_Errors_Whats_the_Difference\"><\/span>502 vs. 504 Gateway Errors: What&#8217;s the Difference?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These errors are related, but they indicate different upstream problems.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Error<\/th><th>Meaning<\/th><\/tr><tr><td><strong>502 Bad Gateway<\/strong><\/td><td>A gateway received an invalid response from an upstream server<\/td><\/tr><tr><td><strong>504 Gateway Timeout<\/strong><\/td><td>A gateway didn&#8217;t receive the required upstream response in time<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For example, an application that closes a connection unexpectedly may result in a 502 error, while an application that takes too long to respond may cause a 504.<\/p>\n\n\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\">If you&#8217;re troubleshooting an invalid upstream response specifically, <strong>read our guide on<\/strong> <a href=\"https:\/\/zynoo.com\/blog\/502-bad-gateway-nginx\/\">how to fix 502 Bad Gateway in Nginx<\/a>.<\/p>\n<\/div>\n\n\n\n<h2 id=\"h-how-to-prevent-504-gateway-timeout-errors\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Prevent_504_Gateway_Timeout_Errors\"><\/span>How to Prevent 504 Gateway Timeout Errors<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not every timeout can be prevented, but good infrastructure management helps reduce them.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Monitor application response times and resource usage.<\/li>\n\n\n\n<li>Investigate slow database queries.<\/li>\n\n\n\n<li>Use appropriate caching for frequently requested content.<\/li>\n\n\n\n<li>Configure sensible upstream and application timeouts.<\/li>\n\n\n\n<li>Monitor backend services and worker availability.<\/li>\n\n\n\n<li>Test major configuration changes before deploying them.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Increasing timeout limits should be a considered decision, not the first troubleshooting step.<\/p>\n\n\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793531637387\"><strong class=\"schema-faq-question\">Is 504 Gateway Timeout a server error?<\/strong> <p class=\"schema-faq-answer\">Yes. HTTP 504 is a server-side status code indicating that a gateway or proxy didn&#8217;t receive a timely response from an upstream server.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531657129\"><strong class=\"schema-faq-question\">Can clearing browser cache fix a 504 error?<\/strong> <p class=\"schema-faq-answer\">Usually not. Browser cache doesn&#8217;t resolve an overloaded or unresponsive backend server. However, testing another browser or connection can help rule out localized issues.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531671489\"><strong class=\"schema-faq-question\">Is a 504 error temporary?<\/strong> <p class=\"schema-faq-answer\">It can be. Temporary overload or a slow backend request may resolve quickly, while recurring timeouts indicate a problem requiring investigation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531690686\"><strong class=\"schema-faq-question\">Can WordPress websites experience 504 errors?<\/strong> <p class=\"schema-faq-answer\">Yes. WordPress and other applications can experience 504 errors when database queries, PHP processing, or upstream services take too long.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531706231\"><strong class=\"schema-faq-question\">Should I increase the Nginx timeout to fix a 504 error?<\/strong> <p class=\"schema-faq-answer\">Only when the application legitimately requires more time and the other infrastructure limits support it. First determine why the backend response is delayed.<\/p> <\/div> <\/div>\n\n\n\n<h3 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>504 Gateway Timeout<\/strong> error means a gateway waited too long for an upstream server to respond.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Visitors can check whether the problem is temporary, while administrators should examine logs, server resources, application performance, and proxy settings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most reliable fix is to identify the source of the delay rather than blindly increasing timeout limits or restarting services.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A 504 Gateway Timeout error occurs when a server acting as a gateway or proxy doesn&#8217;t receive a response from another server in time. It commonly happens when a website&#8217;s backend application is slow, overloaded, or experiencing connectivity problems. If you&#8217;re visiting a website, try refreshing the page after a short interval. If you manage [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5083,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[499],"tags":[14],"class_list":["post-5076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux-tutorials","tag-how-to"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Fix 504 Gateway Timeout Error (7 Fixes)<\/title>\n<meta name=\"description\" content=\"Fix 504 Gateway Timeout errors by troubleshooting slow servers, Nginx, Cloudflare, application timeouts, and hosting issues.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zynoo.com\/blog\/504-gateway-timeout\/\" \/>\n<meta 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