{"id":7960,"date":"2025-11-05T10:42:42","date_gmt":"2025-11-05T10:42:42","guid":{"rendered":"https:\/\/kb.cloudhostgeek.com\/?p=7960"},"modified":"2025-11-05T10:42:42","modified_gmt":"2025-11-05T10:42:42","slug":"503-node-js-in-cpanel","status":"publish","type":"post","link":"https:\/\/www.bigcloudy.com\/knowledge-base\/503-node-js-in-cpanel\/","title":{"rendered":"How to fix 503 Service Unavailable error for node.js in cPanel?"},"content":{"rendered":"\n<p>The error mainly occurs when the cPanel account exceeds its resource limits, or the application is not running due to a crash, failed deployment, or being stopped manually.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 1. Login to cPanel.<\/strong><\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 2. Verify the resource limits if it is exceeding for your account. If it is Okay, then proceed with Steps 3.<\/strong><\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 3. Search Setup node.js app and click on it.<br><\/strong><\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 4. Open the application along with the terminal and switch to the source path of the application.<\/strong><br><\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 5. Run the application using&nbsp;<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">          <mark style=\"background-color:rgba(0, 0, 0, 0);color:#14b457\" class=\"has-inline-color\">   <\/mark><mark style=\"background-color:rgba(0, 0, 0, 0);color:#188038\" class=\"has-inline-color\"># npm start<\/mark><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">&nbsp;            or using<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">&nbsp;          <mark style=\"background-color:rgba(0, 0, 0, 0);color:#188038\" class=\"has-inline-color\">  # node index.js runserver<\/mark> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (Use the startup file to run the application)<\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 6. If you are experiencing an error stating that the port is already in use, verify whether another application or instance of the    &nbsp;            <a href=\"https:\/\/www.bigcloudy.com\/nodejs-hosting\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#9b51e0\" class=\"has-inline-color\">Node.js<\/mark><\/a> server is already running on that specific port. You can use commands like<br><br>            <mark style=\"background-color:rgba(0, 0, 0, 0);color:#000000\" class=\"has-inline-color\"> <\/mark><mark style=\"background-color:rgba(0, 0, 0, 0);color:#188038\" class=\"has-inline-color\"># lsof -i :3005<\/mark> or&nbsp; <mark style=\"background-color:rgba(0, 0, 0, 0);color:#188038\" class=\"has-inline-color\"># netstat -tuln | grep 3005<\/mark> &nbsp;to identify the process ID using the port.<\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 7. <mark style=\"background-color:rgba(0, 0, 0, 0);color:#188038\" class=\"has-inline-color\"># kill -9 PID<\/mark> To kill the application<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">             After completion, Restart the application and run&nbsp;<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">             <mark style=\"background-color:rgba(0, 0, 0, 0);color:#188038\" class=\"has-inline-color\"># npm start<\/mark><\/h4>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The error mainly occurs when the cPanel account exceeds its resource limits, or the application is not running due to a crash, failed deployment, or being stopped manually. Step 1. Login to cPanel. Step 2. Verify the resource limits if it is exceeding for your account. If it is Okay, then proceed with Steps 3. Step 3. Search Setup node.js app and click on it. Step 4. Open the application along with the terminal and switch to the source path of the application. Step 5. Run the application using&nbsp; # npm start &nbsp; or using &nbsp; # node index.js runserver &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (Use the startup file to run the application) Step 6. If you are experiencing an error stating that the port is already in use, verify whether another application or instance of the &nbsp; Node.js server is already running on that specific port. You can use commands like # lsof -i :3005 or&nbsp; # netstat -tuln | grep 3005 &nbsp;to identify the process ID using the port. Step 7. # kill -9 PID To kill the application After completion, Restart the application and run&nbsp; # npm start<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","footnotes":""},"categories":[5,302],"tags":[303,39,297],"class_list":["post-7960","post","type-post","status-publish","format-standard","hentry","category-cpanel","category-node-js","tag-503-error","tag-cpanel","tag-node-js","no-post-thumbnail"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to fix 503 Service Unavailable error for node.js in cPanel? - CloudHostGeek Help Center<\/title>\n<meta name=\"description\" content=\"learn how to fix the 503 error for Node.js in cPanel easily. Check resource limits, restart the app, and solve port conflicts step by step\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bigcloudy.com\/knowledge-base\/503-node-js-in-cpanel\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to fix 503 Service Unavailable error for node.js in cPanel?\" \/>\n<meta property=\"og:description\" content=\"learn how to fix the 503 error for Node.js in cPanel easily. 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