Regular 503 error every 5 minutes for logged in users

From my experience, you had far, far too many plugins. Disable everything, choose one of the twenty**** default themes and try again.

You should also check your server log and see if you can see anything in there that would help (and post it here).

Lastly, take a backup of your entire site (code, uploads, database) and then do a clean install of the latest WordPress release with a clean database and see if you still get an issue. It could still be a problem with your hosting or some configuration on your account.

Related Posts:

  1. Cannot access non-wordpress subdirectories as wordpress overrides them with a 404 error
  2. Change login error messages
  3. Notice: Undefined index: host in /var/www/html/wp-includes/canonical.php on line 445
  4. Notice: Constant WP_POST_REVISIONS already defined
  5. How to stop certain warning logging in error.log?
  6. Error 404 Page Not Found When Updating a Post or Page
  7. Debug mode shows Strict Standards
  8. Why on Earth am I getting “undefined_index” errors?
  9. Debugging ‘Object of class WP_Query could not be converted to int’ error
  10. Displaying oEmbed errors?
  11. “Apache HTTP Service has stopped working” with WP Query in WordPress 2.9.2
  12. Add image only in first post
  13. Showing “ Notice: Undefined variable:” and “ Notice: Trying to get property of non-object”
  14. Publishing Time – WordPress Plain White Screen with No Error
  15. Sodium compat error
  16. Fatal error: require(): Failed opening required ‘WP_DIRwp-blog-header.php’
  17. add_sub_menu page() to be replaced by add_theme_page()
  18. Removing warnings and notices from production servers
  19. : Failed to load resource
  20. What does this error mean? WordPress database error: [MySQL server has gone away]
  21. Fatal error: Call to undefined function is_multisite()
  22. Error trying to publish immediately. Post status = future (Missed schedule error)
  23. Form Post results in 404 Not Found [duplicate]
  24. WordPress white screen with word ‘error’ [closed]
  25. File does not exist – wp-index.php
  26. REST : how do you handle the rest_no_route error?
  27. I need https::/mysite.com instead of https::/mysite.com/wordpress
  28. Nginx 404, 500 errors and WordPress
  29. Warning: Invalid argument supplied for foreach() in portfolio-list.php [closed]
  30. “Undefined index” in wp-includes/media.php
  31. Can’t post to my WordPress site
  32. Error message prevents access to WP
  33. I could not access my website wp-admin after installing SSL. And error with mixed content
  34. Page Not Found on categories / tags / pages
  35. is there any function to store logs & send mail to admin?
  36. Error on moving WordPress site to Host from Local installation
  37. Visual editor become blank after updating an article
  38. wp_remote_get sslv3 alert handshake failure
  39. Getting notices on fresh 3.6.1 install
  40. Error after moving WordPress installation
  41. Declare Global Variable In OOP PHP
  42. How can I fix buggy WordPress dashboard [duplicate]
  43. I was adding the custom CSS & JS using hooks and there was this error even I didn’t touch the wp-class-hook
  44. Why can I not execute php files under the wp-includes folder?
  45. Enqueued stylesheet appends query string, causing “SyntaxError: Invalid or unexpected token”
  46. WordPress custom plugin gives error
  47. Can’t access my site please help
  48. WP displays “some_strange_number Version” in the bottom right corner
  49. @file_get_contents and wp_remote_get
  50. Headers already sent by
  51. Failed: Filesystem preventing downloads. ( ftpext)
  52. Code snippet to display ID gives critical error
  53. I tried to build a theme from scratch and it crashed everything
  54. error log bloated by add_view
  55. Unable to locate WordPress content directory
  56. WP Core Update Issue
  57. Cannot upgrade to 4.0 – get SSL certificate error
  58. Fatal Error: get_header();
  59. Error when setting cookie
  60. download count29.php whene loading site [closed]
  61. My new WordPress blog keeps refreshing in Chrome browser
  62. Of thumbnails and folder permissions
  63. Media dint apper in wordpress media library after uploaded through file manager
  64. When trying to access home page, WordPress appends /wordpress to domain name which gives 404 error
  65. How to turn off WP error handling, but turn on php error handling?
  66. Fatal error: Uncaught Error: Maximum function nesting level of ‘5000’ reached
  67. Suddenly get errors in admin when editing post type
  68. Cannot update WordPress Core via admin dashboard
  69. When writing a new blog post error message ‘ sorry, you are not allowed to edit this page ‘
  70. Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘add_custom_scripts’ not found or invalid function name
  71. Header already sent, error shows core files
  72. : this page isn’t working. is unable to handle the request. Http error 500
  73. admin page error
  74. Getting amp; on every single category, post and page title. How to Remove?
  75. Site has fake users registered with a similar pattern in username and email
  76. WordPress fails when my post is larger than 1400 words
  77. Seeing “error” as text on white when accessing admin
  78. Unregister Settings Error
  79. Weird Parse Error on Uploaded File
  80. 500 internal server error with wordpress
  81. call user func array error after moved the site to new server
  82. do_action( ‘init’ ) in wp-settings.php breaks my website. All plugins and themes disabled
  83. Why I am having error Call to undefined function get_header()?
  84. WP_Error message
  85. Avoiding “headers already sent” in WordPress
  86. Fatal error: Cannot declare class WP_User_Request, because the name is already in use?
  87. Unexpected error with class-wp-hook.php on WordPress
  88. Fatal error: Call to undefined function wp_raise_memory_limit()
  89. problem ajaxurl – designthemes-core-features
  90. Help with overloading the limits of CPU/RAM issue in a resseler account with wp sites
  91. WordPress “Allowed memory size” on wp-db.php [closed]
  92. Parse error: syntax error, unexpected T_STRING, expecting ‘,’ or ‘;’ [closed]
  93. Whole right area of wordpress admin dashboard not showing
  94. Only specific users timing out
  95. WordPress Customizer not loading
  96. Error Message – Cannot login to WordPress
  97. Is it possible to empty debug.log programmatically?
  98. File doesn’t exist! in wordpress function.php file while creating new post or page
  99. Core error when calling remove_menu_page
  100. Customizing login message