Fixing 520 Errors

  • If you are getting 520 error most likely your headers exceed CloudFlare’s header size limit (over 8kb).

    We’re planning to release a new version fixing the issue.

    To temporarly fix your website you need to disable HTTP/2 Server Push feature.

    – SSH to your server.
    – open /your_wordpress_path/wp-content/plugins/cloudflare/cloudflare.php with your preferred text editor.
    – Put “//” in the beginning of line 39.

    It should like as following

    // Enable HTTP2 Server Push
//add_action('init', array('\CF\Hooks\HTTP2ServerPush', 'init'));

    Disabling HTTP/2 Server Push will only reverse the added performance benefits to your website.

    =================================================================

    Cloudflare plugin has HTTP/2 Server Push feature which speeds your WordPress blog. To know how HTTP/2 Server Push works please read this blog post.

    If you have additional issues or questions feel free to comment.

    • This topic was modified 8 years, 5 months ago by thellimist.
    • This topic was modified 8 years, 5 months ago by thellimist.
Viewing 11 replies - 1 through 11 (of 11 total)

  • Works.

    If it will help, my setup is:
    * Multisite
    * Flexible SSL
    * WordPress HTTPS (WP plugin)
    * WordPress MU Domain Mapping (WP plugin)
    * CloudFlare Flexible SSL (WP plugin)

    and of course CloudFlare WP plugin.

    Fix works. Thanks

    Could work, but what regular WP user has access to SSH and nows/wants to use it?
    Hopefully this will be fixed soon in the plugin.

    Thread Starter thellimist

    (@furkan811)

    We’ve uploaded version 3.0.1 fixing 520 errors. If you still have any issues related with this I’ll gladly help.

    Changelog: https://en-gb.www.ads-software.com/plugins/cloudflare/changelog/

    Still having http 502 errors.

    root@nginx02:/var/log/nginx# nginx -v && php -v
nginx version: nginx/1.10.0
PHP 7.0.8-0ubuntu0.16.04.2 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.8-0ubuntu0.16.04.2, Copyright (c) 1999-2016, by Zend Technologies

root@nginx02:/var/log/nginx# dpkg -l | egrep 'php|nginx'
rc  nginx-common                     1.10.0-0ubuntu0.16.04.2         all          small, powerful, scalable web/proxy server - common files
ii  nginx-custom                     1.10.0-3                        amd64        nginx web/proxy server (extended version)
ii  nginx-ee                         1.10.0-3                        all          small, powerful, scalable web/proxy server - ee files
ii  php-common                       1:35ubuntu6                     all          Common files for PHP packages
ii  php-curl                         1:7.0+35ubuntu6                 all          CURL module for PHP [default]
rc  php-memcache                     3.0.9~20151130.fdbd46b-2        amd64        memcache extension module for PHP5
ii  php-memcached                    2.2.0-51-ge573a6e+2.2.0-2build2 amd64        memcached extension module for PHP5, uses libmemcached
ii  php-mysql                        1:7.0+35ubuntu6                 all          MySQL module for PHP [default]
ii  php-pear                         1:1.10.1+submodules+notgz-6     all          PEAR Base System
ii  php-readline                     1:7.0+35ubuntu6                 all          readline module for PHP [default]
ii  php-ssh2                         0.12-39-g3dfe336+0.12-1build1   amd64        Bindings for the libssh2 library
ii  php-xml                          1:7.0+35ubuntu6                 all          DOM, SimpleXML, WDDX, XML, and XSL module for PHP [default]
ii  php-zip                          1:7.0+35ubuntu6                 all          Zip module for PHP [default]
ii  php7.0-cli                       7.0.8-0ubuntu0.16.04.2          amd64        command-line interpreter for the PHP scripting language
ii  php7.0-common                    7.0.8-0ubuntu0.16.04.2          amd64        documentation, examples and common module for PHP
ii  php7.0-curl                      7.0.8-0ubuntu0.16.04.2          amd64        CURL module for PHP
ii  php7.0-fpm                       7.0.8-0ubuntu0.16.04.2          amd64        server-side, HTML-embedded scripting language (FPM-CGI binary)
ii  php7.0-json                      7.0.8-0ubuntu0.16.04.2          amd64        JSON module for PHP
ii  php7.0-mbstring                  7.0.8-0ubuntu0.16.04.2          amd64        MBSTRING module for PHP
ii  php7.0-mysql                     7.0.8-0ubuntu0.16.04.2          amd64        MySQL module for PHP
ii  php7.0-opcache                   7.0.8-0ubuntu0.16.04.2          amd64        Zend OpCache module for PHP
ii  php7.0-phpdbg                    7.0.8-0ubuntu0.16.04.2          amd64        server-side, HTML-embedded scripting language (PHPDBG binary)
ii  php7.0-readline                  7.0.8-0ubuntu0.16.04.2          amd64        readline module for PHP
ii  php7.0-xml                       7.0.8-0ubuntu0.16.04.2          amd64        DOM, SimpleXML, WDDX, XML, and XSL module for PHP
ii  php7.0-zip                       7.0.8-0ubuntu0.16.04.2          amd64        Zip module for PHP

    Hey thellimist,

    installed the fix right now, but again I got the following error:

    upstream sent too big header while reading response header from upstream

    The version before the 3.0.0-update works.

    Thread Starter thellimist

    (@furkan811)

    Hi moody1337,

    Can you upload a full error log?

    Thanks

    Thats everything I got:

    2016/09/16 16:56:38 [error] 1756#1756: *129842 upstream sent too big header while reading response header from upstream, client: 94.135.196.154, server: test.wihel.de, request: “GET /wp-admin/ HTTP/2.0”, upstream: “fastcgi://unix:/run/php/php-fpm1.sock:”, host: “test.wihel.de”

    Or just remove this plugin. Why do we need it? Cloudflare works fine w/o.

    I had the same issue on my website, so I went back to version 1.3.24. They also released a new update again that is version 3.0.2, but that one is still giving problems.

    • This reply was modified 8 years, 5 months ago by lauw8.
    • This reply was modified 8 years, 5 months ago by lauw8.

    Hi @lauw8,

    Can you give me more details on the problems you’re seeing? What specifically is wrong?

    Thanks,
    John

Viewing 11 replies - 1 through 11 (of 11 total)
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