{"id":4975,"date":"2019-08-14T09:58:44","date_gmt":"2019-08-14T04:28:44","guid":{"rendered":"https:\/\/blog.pheonixsolutions.com\/?p=4975"},"modified":"2019-08-14T10:01:08","modified_gmt":"2019-08-14T04:31:08","slug":"websites-hosted-on-plesk-server-often-results-with-502-bad-gateway","status":"publish","type":"post","link":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/","title":{"rendered":"Websites hosted on Plesk server often results with 502 Bad Gateway"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Websites hosted on Plesk server often results with 502 Bad Gateway<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Introduction<\/h3>\n\n\n\n<p>Most importantly, websites are unavailable and often result in 502 Bad gateway in the Plesk server. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Root cause <\/h3>\n\n\n\n<p><strong>A request cannot be processed by the proxy server because of insufficient buffer size.<\/strong><\/p>\n\n\n\n<p>In the log files&nbsp;<code>\/var\/log\/nginx\/error.log<\/code><\/p>\n\n\n\n<p>Consequently, in the following error message can be found &#8220;upstream sent too big header while reading response header&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Sample error log:<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>[error] 13690#0: *244 upstream sent too big header while reading response header from upstream, client: x.x.x.x, server: subdomain.example.com, request: \"POST \/admin_catalog.php HTTP\/1.1\", upstream: \"http:\/\/x.x.x.x\/admin_catalog.php\", host: \"subdomain.example.com\", referrer: \"http:\/\/subdomain.example.com\/admin_catalog.php\"<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">For one or two domains [In specific]<\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>Log in to Plesk panel, firstly.<\/li><li>Go to\u00a0<strong>Domains &gt; zzz.com &gt; PHP Settings<\/strong>\u00a0and check the selected PHP handler (the field\u00a0<strong>run PHP as<\/strong>). <\/li><li>Go to\u00a0<strong>Domains &gt; zzz.com &gt; Apache &amp; nginx Settings<\/strong>, scroll down to the field\u00a0<strong>Additional nginx directives<\/strong>.<br><br>And also set the following parameters in accordance with the used PHP handler:<ul><li>For PHP handler\u00a0<strong>FPM application served by Nginx<\/strong>:<br><br>fastcgi_buffers 8 16k;<br>fastcgi_buffer_size 32k;<\/li><\/ul><\/li><li><strong>For other PHP handlers<\/strong>:<br><br>proxy_buffers 8 16k;<br>proxy_buffer_size 32k;<\/li><\/ol>\n\n\n\n<p>Above all, increase the values of these parameters if it is needed.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">For all the domains in Plesk <\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>Secondly, connect to the server\u00a0using SSH.<br><\/li><li>Open and edit the file\u00a0<code>\/etc\/nginx\/nginx.conf<\/code>\u00a0<br><\/li><li>For instance, increase the following parameters in the section\u00a0<code>http {<\/code>:<br><br>proxy_buffers 8 16k;<br>proxy_buffer_size 32k;\u00a0<br>fastcgi_buffers 8 16k;\u00a0<br>fastcgi_buffer_size 32k;<br><\/li><li>Then, restart nginx to apply changes:<br><br>#\u00a0service nginx restart<\/li><\/ol>\n\n\n\n<p>Thanks for using&nbsp;<a href=\"https:\/\/pheonixsolutions.com\/\">pheonix solutions<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Websites hosted on Plesk server often results with 502 Bad Gateway Introduction Most importantly, websites are unavailable and often result in 502 Bad gateway in the Plesk server. Root cause A request cannot be processed by the proxy server because of insufficient buffer size. In the log files&nbsp;\/var\/log\/nginx\/error.log Consequently, in&hellip; <a href=\"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/\" class=\"more-link read-more\" rel=\"bookmark\">Continue Reading <span class=\"screen-reader-text\">Websites hosted on Plesk server often results with 502 Bad Gateway<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[702,1],"tags":[704,264,705],"class_list":{"0":"post-4975","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-plesk-cpanel","7":"category-uncategorized","8":"tag-502-bad-gateway","9":"tag-plesk","10":"tag-upstream-sent-too-big-header-while-reading-response-header","11":"h-entry","13":"h-as-article"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pheonix Solutions - We Empower Your Business Growth<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pheonix Solutions - We Empower Your Business Growth\" \/>\n<meta property=\"og:description\" content=\"Websites hosted on Plesk server often results with 502 Bad Gateway Introduction Most importantly, websites are unavailable and often result in 502 Bad gateway in the Plesk server. Root cause A request cannot be processed by the proxy server because of insufficient buffer size. In the log files&nbsp;\/var\/log\/nginx\/error.log Consequently, in&hellip; Continue Reading Websites hosted on Plesk server often results with 502 Bad Gateway\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/\" \/>\n<meta property=\"og:site_name\" content=\"PHEONIXSOLUTIONS\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/PheonixSolutions-209942982759387\/\" \/>\n<meta property=\"article:published_time\" content=\"2019-08-14T04:28:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-08-14T04:31:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2016\/09\/PX2.png\" \/>\n\t<meta property=\"og:image:width\" content=\"3837\" \/>\n\t<meta property=\"og:image:height\" content=\"2540\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@pheonixsolution\" \/>\n<meta name=\"twitter:site\" content=\"@pheonixsolution\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#\\\/schema\\\/person\\\/0ffa33d73c869faec2d50e79c24e3503\"},\"headline\":\"Websites hosted on Plesk server often results with 502 Bad Gateway\",\"datePublished\":\"2019-08-14T04:28:44+00:00\",\"dateModified\":\"2019-08-14T04:31:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/\"},\"wordCount\":238,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#organization\"},\"keywords\":[\"502 bad gateway\",\"Plesk\",\"upstream sent too big header while reading response header\"],\"articleSection\":[\"plesk\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/\",\"url\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/\",\"name\":\"Pheonix Solutions - We Empower Your Business Growth\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#website\"},\"datePublished\":\"2019-08-14T04:28:44+00:00\",\"dateModified\":\"2019-08-14T04:31:08+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Websites hosted on Plesk server often results with 502 Bad Gateway\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/\",\"name\":\"Pheonix Solutions\",\"description\":\"We Empower Your Business Growth\",\"publisher\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#organization\",\"name\":\"PheonixSolutions\",\"url\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/logo.png\",\"width\":454,\"height\":300,\"caption\":\"PheonixSolutions\"},\"image\":{\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/PheonixSolutions-209942982759387\\\/\",\"https:\\\/\\\/x.com\\\/pheonixsolution\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/#\\\/schema\\\/person\\\/0ffa33d73c869faec2d50e79c24e3503\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/09bacc0294abee1322a23ab4bc6a0330dd4cb4df707dc9d0b0efeba6c109608b?s=96&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/09bacc0294abee1322a23ab4bc6a0330dd4cb4df707dc9d0b0efeba6c109608b?s=96&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/09bacc0294abee1322a23ab4bc6a0330dd4cb4df707dc9d0b0efeba6c109608b?s=96&r=g\",\"caption\":\"admin\"},\"sameAs\":[\"http:\\\/\\\/blog.pheonixsolutions.com\"],\"url\":\"https:\\\/\\\/pheonixsolutions.com\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Pheonix Solutions - We Empower Your Business Growth","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/","og_locale":"en_US","og_type":"article","og_title":"Pheonix Solutions - We Empower Your Business Growth","og_description":"Websites hosted on Plesk server often results with 502 Bad Gateway Introduction Most importantly, websites are unavailable and often result in 502 Bad gateway in the Plesk server. Root cause A request cannot be processed by the proxy server because of insufficient buffer size. In the log files&nbsp;\/var\/log\/nginx\/error.log Consequently, in&hellip; Continue Reading Websites hosted on Plesk server often results with 502 Bad Gateway","og_url":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/","og_site_name":"PHEONIXSOLUTIONS","article_publisher":"https:\/\/www.facebook.com\/PheonixSolutions-209942982759387\/","article_published_time":"2019-08-14T04:28:44+00:00","article_modified_time":"2019-08-14T04:31:08+00:00","og_image":[{"width":3837,"height":2540,"url":"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2016\/09\/PX2.png","type":"image\/png"}],"author":"admin","twitter_card":"summary_large_image","twitter_creator":"@pheonixsolution","twitter_site":"@pheonixsolution","twitter_misc":{"Written by":"admin","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/#article","isPartOf":{"@id":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/"},"author":{"name":"admin","@id":"https:\/\/pheonixsolutions.com\/blog\/#\/schema\/person\/0ffa33d73c869faec2d50e79c24e3503"},"headline":"Websites hosted on Plesk server often results with 502 Bad Gateway","datePublished":"2019-08-14T04:28:44+00:00","dateModified":"2019-08-14T04:31:08+00:00","mainEntityOfPage":{"@id":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/"},"wordCount":238,"commentCount":0,"publisher":{"@id":"https:\/\/pheonixsolutions.com\/blog\/#organization"},"keywords":["502 bad gateway","Plesk","upstream sent too big header while reading response header"],"articleSection":["plesk"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/","url":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/","name":"Pheonix Solutions - We Empower Your Business Growth","isPartOf":{"@id":"https:\/\/pheonixsolutions.com\/blog\/#website"},"datePublished":"2019-08-14T04:28:44+00:00","dateModified":"2019-08-14T04:31:08+00:00","breadcrumb":{"@id":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/pheonixsolutions.com\/blog\/websites-hosted-on-plesk-server-often-results-with-502-bad-gateway\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/pheonixsolutions.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Websites hosted on Plesk server often results with 502 Bad Gateway"}]},{"@type":"WebSite","@id":"https:\/\/pheonixsolutions.com\/blog\/#website","url":"https:\/\/pheonixsolutions.com\/blog\/","name":"Pheonix Solutions","description":"We Empower Your Business Growth","publisher":{"@id":"https:\/\/pheonixsolutions.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/pheonixsolutions.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/pheonixsolutions.com\/blog\/#organization","name":"PheonixSolutions","url":"https:\/\/pheonixsolutions.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/pheonixsolutions.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2016\/12\/logo.png","contentUrl":"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2016\/12\/logo.png","width":454,"height":300,"caption":"PheonixSolutions"},"image":{"@id":"https:\/\/pheonixsolutions.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/PheonixSolutions-209942982759387\/","https:\/\/x.com\/pheonixsolution"]},{"@type":"Person","@id":"https:\/\/pheonixsolutions.com\/blog\/#\/schema\/person\/0ffa33d73c869faec2d50e79c24e3503","name":"admin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/09bacc0294abee1322a23ab4bc6a0330dd4cb4df707dc9d0b0efeba6c109608b?s=96&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/09bacc0294abee1322a23ab4bc6a0330dd4cb4df707dc9d0b0efeba6c109608b?s=96&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/09bacc0294abee1322a23ab4bc6a0330dd4cb4df707dc9d0b0efeba6c109608b?s=96&r=g","caption":"admin"},"sameAs":["http:\/\/blog.pheonixsolutions.com"],"url":"https:\/\/pheonixsolutions.com\/blog\/author\/admin\/"}]}},"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p7F4uM-1if","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts\/4975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/comments?post=4975"}],"version-history":[{"count":0,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/posts\/4975\/revisions"}],"wp:attachment":[{"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/media?parent=4975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/categories?post=4975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pheonixsolutions.com\/blog\/wp-json\/wp\/v2\/tags?post=4975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}