Urgent! Error 521 Web server is down

WordPress Multisite
#1

Keywords: WordPress Multisite - Google Cloud Platform - Technical issue - Services (Apache, MariaDB, MySQL…)

bndiagnostic ID: 655c4ba8-3e97-a789-e162-bebcdd783e9a

bndiagnostic output:

? Connectivity: Found possible issues
? Php: Found possible issues
? Apache: Found possible issues
https://docs.bitnami.com/general/faq/administration/use-firewall/
https://docs.bitnami.com/general/apps/wordpress/configuration/configure-phpfpm-processes/
https://docs.bitnami.com/general/apps/wordpress/troubleshooting/debug-errors-apache/
https://docs.bitnami.com/bch/apps/moodle/troubleshooting/deny-connections-bots-apache/

bndiagnostic failure reason: The documentation did not make any significant change

Description:

  1. Found not enough disk and memory, so change the Machine type of GCP, but site can not be accessed after rebooting.
  2. Ran Bitnami Diagnostic Tool, “Server ports 22, 80 and/or 443 are not publicly accessible.”
  3. Followed Open or close server ports got bitnami-default-ports [“80”, “443”] correctly.

Still got Error 521 Web server is down, any suggestion…
Thanks

#2

Had followed the instruction from Bitnami Diagnostic Tool…

  1. [Connectivity] error…Firewall rules are correct as: Ingress bitnami-wordpress-0ed9 IP ranges: 0.0.0.0/0 tcp:22, 80, 443 Allow 1000 [default]
  2. [Php] error…Changed pool.conf to pm=ondemand
  3. [Apache] error…Can not deactivate SmartSlider3 plugin since web server is down

Still got Error 521 Web server is down, can anybody help please…

Thanks

#3

Restored the backup, the site is back. But still would like to know what was wrong, any comment is appreciated.

#4

Hi @johocen168,

I’m glad to hear you solved the issue. For future reference, the tool found these problems:

  • An issue with one of the plugins you have
[Wed Apr 13 23:11:23.333788 2022] [proxy_fcgi:error] [pid 6550:tid 139932962047744] [client **ip_address**:62638] AH01071: Got error 'play->display, Nextend\SmartSlider3\SliderManager\SliderManager->render, Nextend\SmartSlider3\SliderManager\SliderManager->cacheSlider, Nextend\SmartSlider3\Slider\Cache\CacheSlider->makeCache, Nextend\Framework\Cache\Manifest->makeCache, Next...PHP message: WordPress 資料庫錯誤: Table 'bitnami_wordpress.wp_48_nextend2_smartslider3_sliders' doesn't exist (由 require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/exs/page.php'), the_content, apply_filters('the_content'), WP_Hook->apply_filters, do_shortcode, preg_replace_callback, do_shortcode_tag, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::doShortcode, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::render, Nextend\Framework\Application\AbstractApplicationType->process, Nextend\Framework\Controller\AbstractController->doAction, call_user_func_array, Nextend\SmartSlider3\Application\Frontend\Slider\ControllerSlider->actionDisplay, Nextend\SmartSlider3\Application\Frontend\Slider\ViewDisplay->display, Nextend\SmartSlider3\SliderManager\SliderManager->render, Nextend\SmartSlider3\SliderManager\SliderManager->cacheSlider, Nextend\SmartSlider3\Slider\Cache\CacheSlider->makeCache, Nextend\Framework\Cache\Manifest->makeCache,...PHP message: WordPress 資料庫錯誤: Table 'bitnami_wordpress.wp_48_nextend2_smartslider3_sliders' doesn't exist (由 require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/exs/page.php'), the_content, apply_filters('the_content'), WP_Hook->apply_filters, do_shortcode, preg_replace_callback, do_shortcode_tag, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::doShortcode, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::render, Nextend\Framework\Application\AbstractApplicationType->process, Nextend\Framework\Controller\AbstractController->doAction, call_user_func_array, Nextend\SmartSlider3\Application\Frontend\Slider\ControllerSlider->actionDisplay, Nextend\SmartSlider3\Application\Frontend\Slider\ViewDisplay->display, Nextend\SmartSlider3\SliderManager\SliderManager->__construct, Nextend\SmartSlider3\Application\Model\ModelS
[Wed Apr 13 23:12:57.468562 2022] [proxy_fcgi:error] [pid 6550:tid 139933029189376] [client **ip_address**:19964] AH01071: Got error 'PHP message: WordPress 資料庫錯誤: Table 'bitnami_wordpress.wp_48_actionscheduler_actions' doesn't exist (由 shutdown_action_hook, do_action('shutdown'), WP_Hook->do_action, WP_Hook->apply_filters, ActionScheduler_QueueRunner->maybe_dispatch_async_request, ActionScheduler_AsyncRequest_QueueRunner->maybe_dispatch, ActionScheduler_AsyncRequest_QueueRunner->allow, ActionScheduler_Abstract_QueueRunner->has_maximum_concurrent_batches, ActionScheduler_HybridStore->get_claim_count, ActionScheduler_DBStore->get_claim_count 的查詢 SELECT COUNT(DISTINCT claim_id) FROM wp_48_actionscheduler_actions WHERE claim_id != 0 AND status IN ( 'pending', 'in-progress') 觸發)PHP message: WordPress 資料庫錯誤: Table 'bitnami_wordpress.wp_48_actionscheduler_actions' doesn't exist (由 shutdown_action_hook, do_action('shutdown'), WP_Hook->do_action, WP_Hook->apply_filters, ActionScheduler_QueueRunner->maybe_dispatch_async_request, ActionScheduler_AsyncRequest_QueueRunner->maybe_dispatch, ActionScheduler_AsyncRequest_QueueRunner->allow, ActionScheduler_Store->has_pending_actions_due, ActionScheduler_HybridStore->query_actions, ActionScheduler_DBStore->query_actions 的查詢 SELECT a.action_id FROM wp_48_actionscheduler_actions a WHERE 1=1 AND a.status IN ('pending') AND a.scheduled_date_gmt <= '2022-04-13 23:12:57' LIMIT 0, 5 觸發)', referer: https://staging.johocen.com/checkout/

[Wed Apr 13 23:12:58.109896 2022] [proxy_fcgi:error] [pid 6550:tid 139933004011264] [client **ip_address**:14758] AH01071: Got error 'play->display, Nextend\SmartSlider3\SliderManager\SliderManager->render, Nextend\SmartSlider3\SliderManager\SliderManager->cacheSlider, Nextend\SmartSlider3\Slider\Cache\CacheSlider->makeCache, Nextend\Framework\Cache\Manifest->makeCache, Next...PHP message: WordPress 資料庫錯誤: Table 'bitnami_wordpress.wp_48_nextend2_smartslider3_sliders' doesn't exist (由 require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/exs/page.php'), the_content, apply_filters('the_content'), WP_Hook->apply_filters, do_shortcode, preg_replace_callback, do_shortcode_tag, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::doShortcode, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::render, Nextend\Framework\Application\AbstractApplicationType->process, Nextend\Framework\Controller\AbstractController->doAction, call_user_func_array, Nextend\SmartSlider3\Application\Frontend\Slider\ControllerSlider->actionDisplay, Nextend\SmartSlider3\Application\Frontend\Slider\ViewDisplay->display, Nextend\SmartSlider3\SliderManager\SliderManager->render, Nextend\SmartSlider3\SliderManager\SliderManager->cacheSlider, Nextend\SmartSlider3\Slider\Cache\CacheSlider->makeCache, Nextend\Framework\Cache\Manifest->makeCache,...PHP message: WordPress 資料庫錯誤: Table 'bitnami_wordpress.wp_48_nextend2_smartslider3_sliders' doesn't exist (由 require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/exs/page.php'), the_content, apply_filters('the_content'), WP_Hook->apply_filters, do_shortcode, preg_replace_callback, do_shortcode_tag, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::doShortcode, Nextend\SmartSlider3\Platform\WordPress\Shortcode\Shortcode::render, Nextend\Framework\Application\AbstractApplicationType->process, Nextend\Framework\Controller\AbstractController->doAction, call_user_func_array, Nextend\SmartSlider3\Application\Frontend\Slider\ControllerSlider->actionDisplay, Nextend\SmartSlider3\Application\Frontend\Slider\ViewDisplay->display, Nextend\SmartSlider3\SliderManager\SliderManager->__construct, Nextend\SmartSlider3\Application\Model\Model

You can contact WordPress or the plugin’s developers to get more info.

  • Performance issues: You can find more information about them here
1 Like
#5

Keywords: WordPress Multisite - Google Cloud Platform - Technical issue - Services (Apache, MariaDB, MySQL…)

bndiagnostic ID: 7bf13091-a023-8a0c-b3db-5ce8a5420581

bndiagnostic output:

? Php: Found possible issues
? Resources: Found possible issues
? Apache: Found possible issues
https://docs.bitnami.com/general/apps/wordpress/configuration/configure-phpfpm-processes/
https://docs.bitnami.com/installer/faq/linux-faq/administration/increase-memory-linux/
https://docs.bitnami.com/general/apps/wordpress/troubleshooting/debug-errors-apache/
https://docs.bitnami.com/bch/apps/moodle/troubleshooting/deny-connections-bots-apache/

bndiagnostic failure reason: The documentation did not make any significant change

Description:
Got this in a duplicated subsite…Error saving action: Error saving action: Table ‘bitnami_wordpress.wp_48_actionscheduler_actions’ doesn’t exist

Also got this “database error…Table ‘bitnami_wordpress.wp_48_nextend2_section_storage’ doesn’t exist”
after running Bitnami Diagnostic Tool

What I should do to correct the database table?
Thanks

#6

Hi @johocen168 ,

Please do not created duplicated tickets for the same issue. As I mentioned, you should contact the plugin’s developer to get more information

1 Like
#7

Thanks for the reply, will keep it in mind.

#8

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