{"id":5098,"date":"2026-10-31T11:10:05","date_gmt":"2026-10-31T11:10:05","guid":{"rendered":"https:\/\/zynoo.com\/blog\/504-gateway-timeout\/"},"modified":"2026-11-01T11:24:40","modified_gmt":"2026-11-01T11:24:40","slug":"504-gateway-timeout","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/vi\/504-gateway-timeout\/","title":{"rendered":"C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i 504 Gateway Timeout (7 c\u00e1ch)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" id=\"h-\">L\u1ed7i <strong>504 Gateway Timeout<\/strong> x\u1ea3y ra khi m\u1ed9t m\u00e1y ch\u1ee7 \u0111\u00f3ng vai tr\u00f2 c\u1ed5ng k\u1ebft n\u1ed1i ho\u1eb7c proxy kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i k\u1ecbp th\u1eddi t\u1eeb m\u00e1y ch\u1ee7 kh\u00e1c. L\u1ed7i n\u00e0y th\u01b0\u1eddng x\u1ea3y ra khi \u1ee9ng d\u1ee5ng ph\u00eda sau c\u1ee7a m\u1ed9t trang web ch\u1ea1y ch\u1eadm, b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c g\u1eb7p s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang truy c\u1eadp m\u1ed9t trang web, h\u00e3y \u0111\u1ee3i m\u1ed9t l\u00e1t r\u1ed3i t\u1ea3i l\u1ea1i trang. N\u1ebfu b\u1ea1n qu\u1ea3n l\u00fd trang web, h\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra nh\u1eadt k\u00fd m\u00e1y ch\u1ee7 v\u00e0 \u1ee9ng d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ef1 ch\u1eadm tr\u1ec5 x\u1ea3y ra \u1edf \u0111\u00e2u.<\/p>\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3y c\u00e1ch thi\u1ebft th\u1ef1c \u0111\u1ec3 t\u00ecm nguy\u00ean nh\u00e2n v\u00e0 kh\u1eafc ph\u1ee5c l\u1ed7i.<\/p>\n\n<h2 id=\"h-what-causes-a-504-gateway-timeout-error\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nguyen_nhan_nao_gay_ra_loi_504_Gateway_Timeout\"><\/span>Nguy\u00ean nh\u00e2n n\u00e0o g\u00e2y ra l\u1ed7i 504 Gateway Timeout?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u trang web s\u1eed d\u1ee5ng nhi\u1ec1u m\u00e1y ch\u1ee7 ho\u1eb7c d\u1ecbch v\u1ee5 \u0111\u1ec3 x\u1eed l\u00fd y\u00eau c\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, tr\u00ecnh duy\u1ec7t c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi Nginx ho\u1eb7c CDN, sau \u0111\u00f3 y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c chuy\u1ec3n ti\u1ebfp \u0111\u1ebfn m\u00e1y ch\u1ee7 \u1ee9ng d\u1ee5ng.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu \u1ee9ng d\u1ee5ng \u0111\u00f3 ph\u1ea3n h\u1ed3i qu\u00e1 ch\u1eadm, c\u1ed5ng k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 tr\u1ea3 v\u1ec1 l\u1ed7i 504 thay v\u00ec trang \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u1eb7p g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>M\u00e1y ch\u1ee7 \u1ee9ng d\u1ee5ng b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c kh\u00f4ng ph\u1ea3n h\u1ed3i.<\/li>\n\n\n\n<li>Truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c y\u00eau c\u1ea7u \u0111\u1ebfn API b\u00ean ngo\u00e0i ch\u1ea1y ch\u1eadm.<\/li>\n\n\n\n<li>Kh\u00f4ng \u0111\u1ee7 CPU, RAM ho\u1eb7c ti\u1ebfn tr\u00ecnh x\u1eed l\u00fd c\u1ee7a \u1ee9ng d\u1ee5ng.<\/li>\n\n\n\n<li>S\u1ef1 c\u1ed1 m\u1ea1ng gi\u1eefa c\u1ed5ng k\u1ebft n\u1ed1i v\u00e0 m\u00e1y ch\u1ee7 ph\u00eda sau.<\/li>\n\n\n\n<li>Gi\u1edbi h\u1ea1n th\u1eddi gian ch\u1edd c\u1ee7a proxy ho\u1eb7c \u1ee9ng d\u1ee5ng.<\/li>\n\n\n\n<li>CDN ho\u1eb7c h\u1ea1 t\u1ea7ng l\u01b0u tr\u1eef \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh sai.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">L\u1ed7i 504 th\u01b0\u1eddng l\u00e0 s\u1ef1 c\u1ed1 ph\u00eda m\u00e1y ch\u1ee7, m\u1eb7c d\u00f9 \u0111\u00f4i khi c\u00e1c v\u1ea5n \u0111\u1ec1 ri\u00eang c\u1ee7a t\u1eebng k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ed9t s\u1ed1 kh\u00e1ch truy c\u1eadp.<\/p>\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=\"Nguy\u00ean nh\u00e2n g\u00e2y ra l\u1ed7i 504 Gateway Timeout\" 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<h2 id=\"h-1-refresh-the-website-and-check-its-availability\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Tai_lai_trang_web_va_kiem_tra_kha_nang_truy_cap\"><\/span>1. T\u1ea3i l\u1ea1i trang web v\u00e0 ki\u1ec3m tra kh\u1ea3 n\u0103ng truy c\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n ch\u1ec9 \u0111ang truy c\u1eadp m\u1ed9t trang web, h\u00e3y \u0111\u1ee3i m\u1ed9t l\u00e1t r\u1ed3i t\u1ea3i l\u1ea1i trang.<\/p>\n\n<p class=\"wp-block-paragraph\">T\u00ecnh tr\u1ea1ng m\u00e1y ch\u1ee7 qu\u00e1 t\u1ea3i t\u1ea1m th\u1eddi ho\u1eb7c y\u00eau c\u1ea7u \u0111\u1ebfn h\u1ec7 th\u1ed1ng ph\u00eda sau b\u1ecb gi\u00e1n \u0111o\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 h\u1ebft.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 th\u1eed m\u1ed9t tr\u00ecnh duy\u1ec7t ho\u1eb7c m\u1ea1ng kh\u00e1c \u0111\u1ec3 xem s\u1ef1 c\u1ed1 c\u00f3 ch\u1ec9 x\u1ea3y ra v\u1edbi k\u1ebft n\u1ed1i c\u1ee7a m\u00ecnh hay kh\u00f4ng.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u g\u1eb7p l\u1ed7i, ch\u1ee7 s\u1edf h\u1eefu trang web ho\u1eb7c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef th\u01b0\u1eddng s\u1ebd c\u1ea7n \u0111i\u1ec1u tra.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Tr\u00e1nh g\u1eedi l\u1ea1i nhi\u1ec1u l\u1ea7n c\u00e1c y\u00eau c\u1ea7u thanh to\u00e1n, \u0111\u1eb7t h\u00e0ng ho\u1eb7c bi\u1ec3u m\u1eabu.<\/strong> M\u1ed9t thao t\u00e1c ph\u00eda sau c\u00f3 th\u1ec3 \u0111\u00e3 ho\u00e0n t\u1ea5t d\u00f9 c\u1ed5ng k\u1ebft n\u1ed1i h\u1ebft th\u1eddi gian ch\u1edd tr\u01b0\u1edbc khi tr\u1ea3 v\u1ec1 ph\u1ea3n h\u1ed3i.<\/p>\n\n<h2 id=\"h-2-check-server-and-application-logs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Kiem_tra_nhat_ky_may_chu_va_ung_dung\"><\/span>2. Ki\u1ec3m tra nh\u1eadt k\u00fd m\u00e1y ch\u1ee7 v\u00e0 \u1ee9ng d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7, c\u00e1c t\u1ec7p nh\u1eadt k\u00fd l\u00e0 n\u01a1i t\u1ed1t nh\u1ea5t \u0111\u1ec3 b\u1eaft \u0111\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi Nginx, h\u00e3y ki\u1ec3m tra nh\u1eadt k\u00fd l\u1ed7i:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo tail -n 50 \/var\/log\/nginx\/error.log<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">T\u00ecm c\u00e1c th\u00f4ng b\u00e1o t\u01b0\u01a1ng t\u1ef1 nh\u01b0:<\/p>\n\n<pre class=\"wp-block-code\"><code>upstream timed out (110: Connection timed out)<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y cho th\u1ea5y Nginx \u0111\u00e3 \u0111\u1ee3i qu\u00e1 l\u00e2u \u0111\u1ec3 m\u1ed9t thao t\u00e1c tr\u00ean m\u00e1y ch\u1ee7 ph\u00eda sau ho\u00e0n t\u1ea5t.<\/p>\n\n<p class=\"wp-block-paragraph\">Ti\u1ebfp theo, h\u00e3y ki\u1ec3m tra nh\u1eadt k\u00fd \u1ee9ng d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u00fd do h\u1ec7 th\u1ed1ng ph\u00eda sau ph\u1ea3n h\u1ed3i ch\u1eadm.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ki\u1ec3m tra m\u1ed9t d\u1ecbch v\u1ee5 do systemd qu\u1ea3n l\u00fd:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo journalctl -u myapp -n 50<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Thay <code>myapp<\/code> b\u1eb1ng t\u00ean d\u1ecbch v\u1ee5 th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n.<\/p>\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>N\u1ebfu b\u1ea1n ch\u01b0a t\u1eebng s\u1eed d\u1ee5ng SSH<\/strong>, <a href=\"https:\/\/zynoo.com\/blog\/vi\/ssh-commands\/\">h\u01b0\u1edbng d\u1eabn v\u1ec1 l\u1ec7nh SSH d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/a> c\u1ee7a ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch c\u00e1ch k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 Linux.<\/p>\n<\/div>\n\n<h2 id=\"h-3-check-cpu-ram-and-disk-usage\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Kiem_tra_muc_su_dung_CPU_RAM_va_o_dia\"><\/span>3. Ki\u1ec3m tra m\u1ee9c s\u1eed d\u1ee5ng CPU, RAM v\u00e0 \u1ed5 \u0111\u0129a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">M\u00e1y ch\u1ee7 \u0111ang qu\u00e1 b\u1eadn c\u00f3 th\u1ec3 kh\u00f3 x\u1eed l\u00fd y\u00eau c\u1ea7u trong th\u1eddi gian ch\u1edd c\u1ee7a c\u1ed5ng k\u1ebft n\u1ed1i.<\/p>\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra b\u1ed9 nh\u1edb:<\/p>\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra dung l\u01b0\u1ee3ng \u1ed5 \u0111\u0129a:<\/p>\n\n<pre class=\"wp-block-code\"><code>df -h<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Theo d\u00f5i c\u00e1c ti\u1ebfn tr\u00ecnh:<\/p>\n\n<pre class=\"wp-block-code\"><code>top<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">H\u00e3y t\u00ecm c\u00e1c d\u1ea5u hi\u1ec7u nh\u01b0 t\u00e0i nguy\u00ean li\u00ean t\u1ee5c b\u1ecb s\u1eed d\u1ee5ng \u1edf m\u1ee9c cao, h\u1ebft b\u1ed9 nh\u1edb, h\u1ec7 th\u1ed1ng t\u1ec7p \u0111\u1ea7y ho\u1eb7c ti\u1ebfn tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng b\u1eadn b\u1ea5t th\u01b0\u1eddng.<\/p>\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng k\u1ebft qu\u1ea3 n\u00e0y kh\u00f4ng t\u1ef1 ch\u1ee9ng minh \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n khi\u1ebfn y\u00eau c\u1ea7u h\u1ebft th\u1eddi gian ch\u1edd, nh\u01b0ng c\u00f3 th\u1ec3 gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u n\u0103ng.<\/p>\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>H\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1<\/strong> <a href=\"https:\/\/zynoo.com\/blog\/vi\/linux-commands-for-server-management\/\">c\u00e1c l\u1ec7nh Linux thi\u1ebft y\u1ebfu \u0111\u1ec3 qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7<\/a> tr\u00ecnh b\u00e0y th\u00eam c\u00e1c l\u1ec7nh ki\u1ec3m tra ti\u1ebfn tr\u00ecnh, d\u1ecbch v\u1ee5 v\u00e0 nh\u1eadt k\u00fd.<\/p>\n<\/div>\n\n<h2 id=\"h-4-investigate-nginx-and-upstream-timeouts\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Kiem_tra_thoi_gian_cho_cua_Nginx_va_may_chu_phia_sau\"><\/span>4. Ki\u1ec3m tra th\u1eddi gian ch\u1edd c\u1ee7a Nginx v\u00e0 m\u00e1y ch\u1ee7 ph\u00eda sau<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu Nginx \u0111\u00f3ng vai tr\u00f2 proxy ng\u01b0\u1ee3c, h\u00e3y ki\u1ec3m tra xem \u1ee9ng d\u1ee5ng ph\u00eda sau c\u00f3 ph\u1ea3n h\u1ed3i trong gi\u1edbi h\u1ea1n th\u1eddi gian ch\u1edd \u0111\u00e3 c\u1ea5u h\u00ecnh hay kh\u00f4ng.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng ph\u00eda sau d\u00f9ng HTTP, c\u1ea5u h\u00ecnh c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\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<p class=\"wp-block-paragraph\">Thi\u1ebft l\u1eadp <code>proxy_read_timeout<\/code> ki\u1ec3m so\u00e1t kho\u1ea3ng th\u1eddi gian Nginx ch\u1edd gi\u1eefa c\u00e1c l\u1ea7n \u0111\u1ecdc d\u1eef li\u1ec7u li\u00ean ti\u1ebfp t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u1ed5ng th\u1eddi gian c\u1ee7a to\u00e0n b\u1ed9 y\u00eau c\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi t\u0103ng gi\u00e1 tr\u1ecb n\u00e0y, h\u00e3y ki\u1ec3m tra tr\u1ef1c ti\u1ebfp \u1ee9ng d\u1ee5ng ph\u00eda sau:<\/p>\n\n<pre class=\"wp-block-code\"><code>curl --max-time 15 -i http:\/\/127.0.0.1:3000\/<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Thay \u0111\u1ecba ch\u1ec9 b\u1eb1ng \u0111i\u1ec3m cu\u1ed1i th\u1ef1c t\u1ebf c\u1ee7a \u1ee9ng d\u1ee5ng. M\u1ed9t s\u1ed1 tuy\u1ebfn c\u1ee7a \u1ee9ng d\u1ee5ng c\u00f3 th\u1ec3 y\u00eau c\u1ea7u x\u00e1c th\u1ef1c ho\u1eb7c tr\u1ea3 v\u1ec1 ph\u1ea3n h\u1ed3i h\u1ee3p l\u1ec7 kh\u00e1c HTTP 200.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea3n th\u00e2n \u1ee9ng d\u1ee5ng ch\u1ea1y ch\u1eadm, vi\u1ec7c t\u0103ng th\u1eddi gian ch\u1edd c\u1ee7a Nginx c\u00f3 th\u1ec3 ch\u1ec9 che gi\u1ea5u v\u1ea5n \u0111\u1ec1 g\u1ed1c r\u1ec5.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi th\u1ef1c s\u1ef1 c\u1ea7n th\u1eddi gian ch\u1edd d\u00e0i h\u01a1n, h\u00e3y xem x\u00e9t c\u1ea3 thi\u1ebft l\u1eadp th\u1eddi gian ch\u1edd c\u1ee7a \u1ee9ng d\u1ee5ng. C\u00e1c \u1ee9ng d\u1ee5ng d\u1ef1a tr\u00ean PHP-FPM v\u00e0 FastCGI s\u1eed d\u1ee5ng nh\u1eefng ch\u1ec9 th\u1ecb Nginx kh\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng ph\u00eda sau d\u00f9ng proxy HTTP.<\/p>\n\n<p class=\"wp-block-paragraph\">Sau khi thay \u0111\u1ed5i c\u1ea5u h\u00ecnh, h\u00e3y ki\u1ec3m tra t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a c\u1ea5u h\u00ecnh Nginx tr\u01b0\u1edbc khi t\u1ea3i l\u1ea1i:<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo nginx -t\nsudo systemctl reload nginx<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Ch\u1ec9 t\u1ea3i l\u1ea1i n\u1ebfu qu\u00e1 tr\u00ecnh ki\u1ec3m tra c\u1ea5u h\u00ecnh th\u00e0nh c\u00f4ng.<\/p>\n\n<h2 id=\"h-5-check-cloudflare-or-your-cdn\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Kiem_tra_Cloudflare_hoac_CDN_cua_ban\"><\/span>5. Ki\u1ec3m tra Cloudflare ho\u1eb7c CDN c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu trang web c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng Cloudflare ho\u1eb7c m\u1ed9t m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung kh\u00e1c, h\u00e3y x\u00e1c \u0111\u1ecbnh xem l\u1ed7i h\u1ebft th\u1eddi gian ch\u1edd b\u1eaft ngu\u1ed3n t\u1eeb CDN hay m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra th\u00f4ng tin l\u1ed7i c\u1ee7a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Content_delivery_network\">CDN<\/a> v\u00e0 \u0111\u1ed1i chi\u1ebfu v\u1edbi nh\u1eadt k\u00fd m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u1ed7i 504 c\u00f3 th\u1ec3 xu\u1ea5t ph\u00e1t t\u1eeb m\u1ed9t d\u1ecbch v\u1ee5 ph\u00eda sau m\u00e1y ch\u1ee7 g\u1ed1c ho\u1eb7c t\u1eeb m\u1ed9t l\u1edbp kh\u00e1c tr\u00ean \u0111\u01b0\u1eddng \u0111i c\u1ee7a y\u00eau c\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\">Cloudflare c\u00f3 c\u01a1 ch\u1ebf ri\u00eang v\u1ec1 th\u1eddi gian ch\u1edd k\u1ebft n\u1ed1i v\u00e0 ph\u1ea3n h\u1ed3i, n\u00ean vi\u1ec7c t\u0103ng m\u1ed9t thi\u1ebft l\u1eadp c\u1ee7a Nginx kh\u00f4ng nh\u1ea5t thi\u1ebft ghi \u0111\u00e8 \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n do CDN \u00e1p \u0111\u1eb7t.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u00e1nh v\u00f4 hi\u1ec7u h\u00f3a c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt ho\u1eb7c b\u1ed9 nh\u1edb \u0111\u1ec7m khi ch\u01b0a x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c ngu\u1ed3n g\u1ed1c c\u1ee7a l\u1ed7i h\u1ebft th\u1eddi gian ch\u1edd.<\/p>\n\n<h2 id=\"h-6-investigate-slow-database-queries-and-external-apis\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Kiem_tra_truy_van_co_so_du_lieu_cham_va_API_ben_ngoai\"><\/span>6. Ki\u1ec3m tra truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u1eadm v\u00e0 API b\u00ean ngo\u00e0i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u0110\u00f4i khi m\u00e1y ch\u1ee7 web v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, nh\u01b0ng \u1ee9ng d\u1ee5ng \u0111ang ch\u1edd m\u1ed9t d\u1ecbch v\u1ee5 kh\u00e1c.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng h\u1ee3p th\u01b0\u1eddng g\u1eb7p g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>M\u1ed9t truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian.<\/li>\n\n\n\n<li>M\u1ed9t API b\u00ean ngo\u00e0i ph\u1ea3n h\u1ed3i ch\u1eadm.<\/li>\n\n\n\n<li>Nh\u00f3m ti\u1ebfn tr\u00ecnh x\u1eed l\u00fd c\u1ee7a \u1ee9ng d\u1ee5ng \u0111\u00e3 c\u1ea1n ki\u1ec7t.<\/li>\n\n\n\n<li>C\u00e1c t\u00e1c v\u1ee5 n\u1ec1n tranh ch\u1ea5p t\u00e0i nguy\u00ean.<\/li>\n\n\n\n<li>Kh\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0m ch\u1eadm y\u00eau c\u1ea7u.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Xem x\u00e9t nh\u1eadt k\u00fd \u1ee9ng d\u1ee5ng, nh\u1eadt k\u00fd truy v\u1ea5n ch\u1eadm v\u00e0 c\u00e1c ch\u1ec9 s\u1ed1 c\u1ee7a d\u1ecbch v\u1ee5 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n g\u00e2y ch\u1eadm tr\u1ec5.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu nguy\u00ean nh\u00e2n l\u00e0 m\u1ed9t truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u, h\u00e3y ki\u1ec3m tra ch\u1ec9 m\u1ee5c, k\u1ebf ho\u1ea1ch th\u1ef1c thi truy v\u1ea5n v\u00e0 m\u1ee9c s\u1eed d\u1ee5ng k\u1ebft n\u1ed1i.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c l\u1ec7nh g\u1ecdi API b\u00ean ngo\u00e0i, h\u00e3y c\u1ea5u h\u00ecnh th\u1eddi gian ch\u1edd h\u1ee3p l\u00fd v\u00e0 c\u01a1 ch\u1ebf x\u1eed l\u00fd l\u1ed7i. N\u1ebfu \u1ee9ng d\u1ee5ng h\u1ed7 tr\u1ee3, c\u00e1c t\u00e1c v\u1ee5 ch\u1ea1y l\u00e2u c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi c\u00e1ch x\u1eed l\u00fd b\u1ea5t \u0111\u1ed3ng b\u1ed9.<\/p>\n\n<h2 id=\"h-7-contact-your-hosting-provider\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Lien_he_voi_nha_cung_cap_dich_vu_luu_tru\"><\/span>7. Li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i 504 Gateway Timeout, h\u00e3y li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef v\u00e0 cung c\u1ea5p nh\u1eefng th\u00f4ng tin b\u1ea1n \u0111\u00e3 thu th\u1eadp.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y cung c\u1ea5p t\u00ean mi\u1ec1n b\u1ecb \u1ea3nh h\u01b0\u1edfng, th\u1eddi \u0111i\u1ec3m s\u1ef1 c\u1ed1 b\u1eaft \u0111\u1ea7u, l\u1ed7i c\u00f3 x\u1ea3y ra kh\u00f4ng li\u00ean t\u1ee5c hay kh\u00f4ng v\u00e0 m\u1ecdi th\u00f4ng b\u00e1o nh\u1eadt k\u00fd li\u00ean quan.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec1 c\u1eadp \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i g\u1ea7n \u0111\u00e2y \u0111\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng, c\u01a1 s\u1edf d\u1eef li\u1ec7u, CDN ho\u1eb7c c\u1ea5u h\u00ecnh proxy ng\u01b0\u1ee3c.<\/p>\n\n<p class=\"wp-block-paragraph\">Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u00f3 th\u1ec3 gi\u00fap ki\u1ec3m tra c\u00e1c gi\u1edbi h\u1ea1n t\u00e0i nguy\u00ean v\u00e0 s\u1ef1 c\u1ed1 h\u1ea1 t\u1ea7ng n\u1eb1m ngo\u00e0i quy\u1ec1n qu\u1ea3n tr\u1ecb c\u1ee7a b\u1ea1n.<\/p>\n\n<h2 id=\"h-502-vs-504-gateway-errors-what-s-the-difference\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Loi_cong_ket_noi_502_va_504_khac_nhau_nhu_the_nao\"><\/span>L\u1ed7i c\u1ed5ng k\u1ebft n\u1ed1i 502 v\u00e0 504 kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Hai l\u1ed7i n\u00e0y c\u00f3 li\u00ean quan, nh\u01b0ng cho bi\u1ebft nh\u1eefng v\u1ea5n \u0111\u1ec1 kh\u00e1c nhau \u1edf m\u00e1y ch\u1ee7 ph\u00eda sau.<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>L\u1ed7i<\/th><th>\u00dd ngh\u0129a<\/th><\/tr><tr><td><strong>502 Bad Gateway<\/strong><\/td><td>C\u1ed5ng k\u1ebft n\u1ed1i nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i kh\u00f4ng h\u1ee3p l\u1ec7 t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau<\/td><\/tr><tr><td><strong>504 Gateway Timeout<\/strong><\/td><td>C\u1ed5ng k\u1ebft n\u1ed1i kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i c\u1ea7n thi\u1ebft t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau k\u1ecbp th\u1eddi<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, \u1ee9ng d\u1ee5ng \u0111\u00f3ng k\u1ebft n\u1ed1i \u0111\u1ed9t ng\u1ed9t c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i 502, trong khi \u1ee9ng d\u1ee5ng ph\u1ea3n h\u1ed3i qu\u00e1 ch\u1eadm c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i 504.<\/p>\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\">N\u1ebfu b\u1ea1n \u0111ang t\u00ecm nguy\u00ean nh\u00e2n c\u1ee5 th\u1ec3 c\u1ee7a ph\u1ea3n h\u1ed3i kh\u00f4ng h\u1ee3p l\u1ec7 t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau, <strong>h\u00e3y \u0111\u1ecdc h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1<\/strong> <a href=\"https:\/\/zynoo.com\/blog\/vi\/502-bad-gateway-nginx\/\">c\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i 502 Bad Gateway trong Nginx<\/a>.<\/p>\n<\/div>\n\n<h2 id=\"h-how-to-prevent-504-gateway-timeout-errors\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_phong_tranh_loi_504_Gateway_Timeout\"><\/span>C\u00e1ch ph\u00f2ng tr\u00e1nh l\u1ed7i 504 Gateway Timeout<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n m\u1ecdi tr\u01b0\u1eddng h\u1ee3p h\u1ebft th\u1eddi gian ch\u1edd, nh\u01b0ng qu\u1ea3n l\u00fd h\u1ea1 t\u1ea7ng t\u1ed1t s\u1ebd gi\u00fap gi\u1ea3m b\u1edbt c\u00e1c tr\u01b0\u1eddng h\u1ee3p n\u00e0y.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Theo d\u00f5i th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a \u1ee9ng d\u1ee5ng v\u00e0 m\u1ee9c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean.<\/li>\n\n\n\n<li>Ki\u1ec3m tra c\u00e1c truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u1ea1y ch\u1eadm.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng b\u1ed9 nh\u1edb \u0111\u1ec7m ph\u00f9 h\u1ee3p cho n\u1ed9i dung \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u th\u01b0\u1eddng xuy\u00ean.<\/li>\n\n\n\n<li>C\u1ea5u h\u00ecnh th\u1eddi gian ch\u1edd h\u1ee3p l\u00fd cho m\u00e1y ch\u1ee7 ph\u00eda sau v\u00e0 \u1ee9ng d\u1ee5ng.<\/li>\n\n\n\n<li>Theo d\u00f5i c\u00e1c d\u1ecbch v\u1ee5 ph\u00eda sau v\u00e0 kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng c\u1ee7a c\u00e1c ti\u1ebfn tr\u00ecnh x\u1eed l\u00fd.<\/li>\n\n\n\n<li>Ki\u1ec3m tra nh\u1eefng thay \u0111\u1ed5i c\u1ea5u h\u00ecnh quan tr\u1ecdng tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c t\u0103ng gi\u1edbi h\u1ea1n th\u1eddi gian ch\u1edd c\u1ea7n \u0111\u01b0\u1ee3c c\u00e2n nh\u1eafc k\u1ef9, thay v\u00ec l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean khi t\u00ecm nguy\u00ean nh\u00e2n s\u1ef1 c\u1ed1.<\/p>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\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\">504 Gateway Timeout c\u00f3 ph\u1ea3i l\u00e0 l\u1ed7i m\u00e1y ch\u1ee7 kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3. HTTP 504 l\u00e0 m\u00e3 tr\u1ea1ng th\u00e1i ph\u00eda m\u00e1y ch\u1ee7, cho bi\u1ebft c\u1ed5ng k\u1ebft n\u1ed1i ho\u1eb7c proxy kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i k\u1ecbp th\u1eddi t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531657129\"><strong class=\"schema-faq-question\">X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a tr\u00ecnh duy\u1ec7t c\u00f3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c l\u1ed7i 504 kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Th\u01b0\u1eddng l\u00e0 kh\u00f4ng. B\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a tr\u00ecnh duy\u1ec7t kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c t\u00ecnh tr\u1ea1ng m\u00e1y ch\u1ee7 ph\u00eda sau b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c kh\u00f4ng ph\u1ea3n h\u1ed3i. Tuy nhi\u00ean, th\u1eed m\u1ed9t tr\u00ecnh duy\u1ec7t ho\u1eb7c k\u1ebft n\u1ed1i kh\u00e1c c\u00f3 th\u1ec3 gi\u00fap lo\u1ea1i tr\u1eeb c\u00e1c v\u1ea5n \u0111\u1ec1 ch\u1ec9 x\u1ea3y ra c\u1ee5c b\u1ed9.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531671489\"><strong class=\"schema-faq-question\">L\u1ed7i 504 c\u00f3 ph\u1ea3i ch\u1ec9 l\u00e0 t\u1ea1m th\u1eddi kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3 th\u1ec3. T\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i t\u1ea1m th\u1eddi ho\u1eb7c m\u1ed9t y\u00eau c\u1ea7u x\u1eed l\u00fd ch\u1eadm \u1edf ph\u00eda sau c\u00f3 th\u1ec3 nhanh ch\u00f3ng t\u1ef1 h\u1ebft, c\u00f2n l\u1ed7i h\u1ebft th\u1eddi gian ch\u1edd t\u00e1i di\u1ec5n cho th\u1ea5y c\u00f3 v\u1ea5n \u0111\u1ec1 c\u1ea7n \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531690686\"><strong class=\"schema-faq-question\">Trang web WordPress c\u00f3 th\u1ec3 g\u1eb7p l\u1ed7i 504 kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3. WordPress v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c c\u00f3 th\u1ec3 g\u1eb7p l\u1ed7i 504 khi truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u, qu\u00e1 tr\u00ecnh x\u1eed l\u00fd PHP ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 ph\u00eda sau m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793531706231\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 n\u00ean t\u0103ng th\u1eddi gian ch\u1edd c\u1ee7a Nginx \u0111\u1ec3 kh\u1eafc ph\u1ee5c l\u1ed7i 504 kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Ch\u1ec9 khi \u1ee9ng d\u1ee5ng th\u1ef1c s\u1ef1 c\u1ea7n th\u00eam th\u1eddi gian v\u00e0 c\u00e1c gi\u1edbi h\u1ea1n kh\u00e1c c\u1ee7a h\u1ea1 t\u1ea7ng cho ph\u00e9p. Tr\u01b0\u1edbc ti\u00ean, h\u00e3y x\u00e1c \u0111\u1ecbnh v\u00ec sao ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau b\u1ecb ch\u1eadm.<\/p> <\/div> <\/div>\n\n<h3 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">L\u1ed7i <strong>504 Gateway Timeout<\/strong> c\u00f3 ngh\u0129a l\u00e0 c\u1ed5ng k\u1ebft n\u1ed1i \u0111\u00e3 \u0111\u1ee3i qu\u00e1 l\u00e2u \u0111\u1ec3 nh\u1eadn ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7 ph\u00eda sau.<\/p>\n\n<p class=\"wp-block-paragraph\">Kh\u00e1ch truy c\u1eadp c\u00f3 th\u1ec3 ki\u1ec3m tra xem s\u1ef1 c\u1ed1 c\u00f3 ph\u1ea3i ch\u1ec9 l\u00e0 t\u1ea1m th\u1eddi hay kh\u00f4ng, c\u00f2n qu\u1ea3n tr\u1ecb vi\u00ean n\u00ean xem x\u00e9t nh\u1eadt k\u00fd, t\u00e0i nguy\u00ean m\u00e1y ch\u1ee7, hi\u1ec7u n\u0103ng \u1ee9ng d\u1ee5ng v\u00e0 thi\u1ebft l\u1eadp proxy.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1ch kh\u1eafc ph\u1ee5c \u0111\u00e1ng tin c\u1eady nh\u1ea5t l\u00e0 x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c c\u1ee7a s\u1ef1 ch\u1eadm tr\u1ec5, thay v\u00ec t\u0103ng gi\u1edbi h\u1ea1n th\u1eddi gian ch\u1edd ho\u1eb7c kh\u1edfi \u0111\u1ed9ng l\u1ea1i d\u1ecbch v\u1ee5 m\u1ed9t c\u00e1ch thi\u1ebfu c\u0103n c\u1ee9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u1ed7i 504 Gateway Timeout x\u1ea3y ra khi m\u1ed9t m\u00e1y ch\u1ee7 \u0111\u00f3ng vai tr\u00f2 c\u1ed5ng k\u1ebft n\u1ed1i ho\u1eb7c proxy kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i k\u1ecbp th\u1eddi t\u1eeb m\u00e1y ch\u1ee7 kh\u00e1c. L\u1ed7i n\u00e0y th\u01b0\u1eddng x\u1ea3y ra khi \u1ee9ng d\u1ee5ng ph\u00eda sau c\u1ee7a m\u1ed9t trang web ch\u1ea1y ch\u1eadm, b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c g\u1eb7p s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i. N\u1ebfu [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5099,"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":"default","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":[654],"tags":[664],"class_list":["post-5098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-huong-dan-linux","tag-huong-dan"],"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>C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i 504 Gateway Timeout (7 c\u00e1ch)<\/title>\n<meta name=\"description\" content=\"Kh\u1eafc ph\u1ee5c l\u1ed7i 504 Gateway Timeout b\u1eb1ng c\u00e1ch ki\u1ec3m tra m\u00e1y ch\u1ee7 ch\u1eadm, Nginx, Cloudflare, th\u1eddi gian ch\u1edd c\u1ee7a \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef.\" \/>\n<meta name=\"robots\" content=\"index, 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