404 errors after update. Need to flush rewrite rules network-wide

I know they’re stored in wp_#_options under rewrite_rules and I know there’s an action called flush_rewrite_rules()

What I don’t know is how to apply that. I want to spit-ball and say that making a plugin for mu-plugins that reset everything when it was hit would do it, but you’d still need to visit all of your 1100 sites.

I do have the same thing on my multiblog, when I update something like a theme or plugin and update my subblogs everything works fine but when clicking on a title the post is not showing and I get a 404 error until I update the permalinks once to each subblog after this everything is back to normal. How can I prevent this? It’s time consuming and annoying to update the permalinks after each update at any subblog. Any automation or things that need to be adjusted?

Ok I saw on several posts that the .htaccess file might cause the problem this is why I’m posting my setting here:

# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]
# END WordPress

alas my .htaccess seems to be ok to me.

I’m using the sub folder setting for my multisite with the Domain-Mapping-Plugin.

Will this ever be fixed?

It doesn’t happen to everyone, is the problem. Actually, it’s pretty freakin RARE. At best guess, it’s a combo of server + plugins that causes it ??

Any more information about my host for example that would help? Or which plugins I have installed? That would help?

What is the rewrite_rules value in the options table of a broken blog?

It is grayed out and says SERIALIZED DATA, but this is also showing up at those sub blogs that work fine.
Is it right that you meant the value of the rewrite_rules at this page?
-> wp-admin/options.php

Close, but not exactly. Might be helpful if you find its actual value in phpMyAdmin.

oh sorry here it is whats stored in the DB:
a:73:{s:53:"blog/ngg_tag/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:46:"index.php?ngg_tag=$matches[1]&feed=$matches[2]";s:48:"blog/ngg_tag/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:46:"index.php?ngg_tag=$matches[1]&feed=$matches[2]";s:41:"blog/ngg_tag/([^/]+)/page/?([0-9]{1,})/?$";s:47:"index.php?ngg_tag=$matches[1]&paged=$matches[2]";s:23:"blog/ngg_tag/([^/]+)/?$";s:29:"index.php?ngg_tag=$matches[1]";s:14:".*wp-atom.php$";s:19:"index.php?feed=atom";s:13:".*wp-rdf.php$";s:18:"index.php?feed=rdf";s:13:".*wp-rss.php$";s:18:"index.php?feed=rss";s:14:".*wp-rss2.php$";s:19:"index.php?feed=rss2";s:14:".*wp-feed.php$";s:19:"index.php?feed=feed";s:22:".*wp-commentsrss2.php$";s:34:"index.php?feed=rss2&withcomments=1";s:16:".*wp-signup.php$";s:21:"index.php?signup=true";s:18:".*wp-activate.php$";s:23:"index.php?activate=true";s:32:"eine-seite/attachment/([^/]+)/?$";s:32:"index.php?attachment=$matches[1]";s:42:"eine-seite/attachment/([^/]+)/trackback/?$";s:37:"index.php?attachment=$matches[1]&tb=1";s:62:"eine-seite/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:57:"eine-seite/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:57:"eine-seite/attachment/([^/]+)/comment-page-([0-9]{1,})/?$";s:50:"index.php?attachment=$matches[1]&cpage=$matches[2]";s:25:"(eine-seite)/trackback/?$";s:35:"index.php?pagename=$matches[1]&tb=1";s:45:"(eine-seite)/feed/(feed|rdf|rss|rss2|atom)/?$";s:47:"index.php?pagename=$matches[1]&feed=$matches[2]";s:40:"(eine-seite)/(feed|rdf|rss|rss2|atom)/?$";s:47:"index.php?pagename=$matches[1]&feed=$matches[2]";s:33:"(eine-seite)/page/?([0-9]{1,})/?$";s:48:"index.php?pagename=$matches[1]&paged=$matches[2]";s:40:"(eine-seite)/comment-page-([0-9]{1,})/?$";s:48:"index.php?pagename=$matches[1]&cpage=$matches[2]";s:25:"(eine-seite)(/[0-9]+)?/?$";s:47:"index.php?pagename=$matches[1]&page=$matches[2]";s:32:"feed/(feed|rdf|rss|rss2|atom)/?$";s:27:"index.php?&feed=$matches[1]";s:27:"(feed|rdf|rss|rss2|atom)/?$";s:27:"index.php?&feed=$matches[1]";s:20:"page/?([0-9]{1,})/?$";s:28:"index.php?&paged=$matches[1]";s:41:"comments/feed/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?&feed=$matches[1]&withcomments=1";s:36:"comments/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?&feed=$matches[1]&withcomments=1";s:29:"comments/page/?([0-9]{1,})/?$";s:28:"index.php?&paged=$matches[1]";s:44:"search/(.+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:40:"index.php?s=$matches[1]&feed=$matches[2]";s:39:"search/(.+)/(feed|rdf|rss|rss2|atom)/?$";s:40:"index.php?s=$matches[1]&feed=$matches[2]";s:32:"search/(.+)/page/?([0-9]{1,})/?$";s:41:"index.php?s=$matches[1]&paged=$matches[2]";s:14:"search/(.+)/?$";s:23:"index.php?s=$matches[1]";s:52:"blog/category/(.+?)/feed/(feed|rdf|rss|rss2|atom)/?$";s:52:"index.php?category_name=$matches[1]&feed=$matches[2]";s:47:"blog/category/(.+?)/(feed|rdf|rss|rss2|atom)/?$";s:52:"index.php?category_name=$matches[1]&feed=$matches[2]";s:40:"blog/category/(.+?)/page/?([0-9]{1,})/?$";s:53:"index.php?category_name=$matches[1]&paged=$matches[2]";s:22:"blog/category/(.+?)/?$";s:35:"index.php?category_name=$matches[1]";s:47:"blog/tag/(.+?)/feed/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?tag=$matches[1]&feed=$matches[2]";s:42:"blog/tag/(.+?)/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?tag=$matches[1]&feed=$matches[2]";s:35:"blog/tag/(.+?)/page/?([0-9]{1,})/?$";s:43:"index.php?tag=$matches[1]&paged=$matches[2]";s:17:"blog/tag/(.+?)/?$";s:25:"index.php?tag=$matches[1]";s:52:"blog/author/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:50:"index.php?author_name=$matches[1]&feed=$matches[2]";s:47:"blog/author/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:50:"index.php?author_name=$matches[1]&feed=$matches[2]";s:40:"blog/author/([^/]+)/page/?([0-9]{1,})/?$";s:51:"index.php?author_name=$matches[1]&paged=$matches[2]";s:22:"blog/author/([^/]+)/?$";s:33:"index.php?author_name=$matches[1]";s:74:"blog/([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/feed/(feed|rdf|rss|rss2|atom)/?$";s:80:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&feed=$matches[4]";s:69:"blog/([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/(feed|rdf|rss|rss2|atom)/?$";s:80:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&feed=$matches[4]";s:62:"blog/([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/page/?([0-9]{1,})/?$";s:81:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&paged=$matches[4]";s:44:"blog/([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/?$";s:63:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]";s:61:"blog/([0-9]{4})/([0-9]{1,2})/feed/(feed|rdf|rss|rss2|atom)/?$";s:64:"index.php?year=$matches[1]&monthnum=$matches[2]&feed=$matches[3]";s:56:"blog/([0-9]{4})/([0-9]{1,2})/(feed|rdf|rss|rss2|atom)/?$";s:64:"index.php?year=$matches[1]&monthnum=$matches[2]&feed=$matches[3]";s:49:"blog/([0-9]{4})/([0-9]{1,2})/page/?([0-9]{1,})/?$";s:65:"index.php?year=$matches[1]&monthnum=$matches[2]&paged=$matches[3]";s:31:"blog/([0-9]{4})/([0-9]{1,2})/?$";s:47:"index.php?year=$matches[1]&monthnum=$matches[2]";s:48:"blog/([0-9]{4})/feed/(feed|rdf|rss|rss2|atom)/?$";s:43:"index.php?year=$matches[1]&feed=$matches[2]";s:43:"blog/([0-9]{4})/(feed|rdf|rss|rss2|atom)/?$";s:43:"index.php?year=$matches[1]&feed=$matches[2]";s:36:"blog/([0-9]{4})/page/?([0-9]{1,})/?$";s:44:"index.php?year=$matches[1]&paged=$matches[2]";s:18:"blog/([0-9]{4})/?$";s:26:"index.php?year=$matches[1]";s:32:"blog/[^/]+/attachment/([^/]+)/?$";s:32:"index.php?attachment=$matches[1]";s:42:"blog/[^/]+/attachment/([^/]+)/trackback/?$";s:37:"index.php?attachment=$matches[1]&tb=1";s:62:"blog/[^/]+/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:57:"blog/[^/]+/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:57:"blog/[^/]+/attachment/([^/]+)/comment-page-([0-9]{1,})/?$";s:50:"index.php?attachment=$matches[1]&cpage=$matches[2]";s:25:"blog/([^/]+)/trackback/?$";s:31:"index.php?name=$matches[1]&tb=1";s:45:"blog/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:43:"index.php?name=$matches[1]&feed=$matches[2]";s:40:"blog/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:43:"index.php?name=$matches[1]&feed=$matches[2]";s:33:"blog/([^/]+)/page/?([0-9]{1,})/?$";s:44:"index.php?name=$matches[1]&paged=$matches[2]";s:40:"blog/([^/]+)/comment-page-([0-9]{1,})/?$";s:44:"index.php?name=$matches[1]&cpage=$matches[2]";s:25:"blog/([^/]+)(/[0-9]+)?/?$";s:43:"index.php?name=$matches[1]&page=$matches[2]";s:21:"blog/[^/]+/([^/]+)/?$";s:32:"index.php?attachment=$matches[1]";s:31:"blog/[^/]+/([^/]+)/trackback/?$";s:37:"index.php?attachment=$matches[1]&tb=1";s:51:"blog/[^/]+/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:46:"blog/[^/]+/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:46:"blog/[^/]+/([^/]+)/comment-page-([0-9]{1,})/?$";s:50:"index.php?attachment=$matches[1]&cpage=$matches[2]";}

after updating the permalinks manually the value looks like this:

a:75:{s:48:"ngg_tag/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:46:"index.php?ngg_tag=$matches[1]&feed=$matches[2]";s:43:"ngg_tag/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:46:"index.php?ngg_tag=$matches[1]&feed=$matches[2]";s:36:"ngg_tag/([^/]+)/page/?([0-9]{1,})/?$";s:47:"index.php?ngg_tag=$matches[1]&paged=$matches[2]";s:18:"ngg_tag/([^/]+)/?$";s:29:"index.php?ngg_tag=$matches[1]";s:12:"robots\.txt$";s:18:"index.php?robots=1";s:14:".*wp-atom.php$";s:19:"index.php?feed=atom";s:13:".*wp-rdf.php$";s:18:"index.php?feed=rdf";s:13:".*wp-rss.php$";s:18:"index.php?feed=rss";s:14:".*wp-rss2.php$";s:19:"index.php?feed=rss2";s:14:".*wp-feed.php$";s:19:"index.php?feed=feed";s:22:".*wp-commentsrss2.php$";s:34:"index.php?feed=rss2&withcomments=1";s:32:"feed/(feed|rdf|rss|rss2|atom)/?$";s:27:"index.php?&feed=$matches[1]";s:27:"(feed|rdf|rss|rss2|atom)/?$";s:27:"index.php?&feed=$matches[1]";s:20:"page/?([0-9]{1,})/?$";s:28:"index.php?&paged=$matches[1]";s:41:"comments/feed/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?&feed=$matches[1]&withcomments=1";s:36:"comments/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?&feed=$matches[1]&withcomments=1";s:29:"comments/page/?([0-9]{1,})/?$";s:28:"index.php?&paged=$matches[1]";s:44:"search/(.+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:40:"index.php?s=$matches[1]&feed=$matches[2]";s:39:"search/(.+)/(feed|rdf|rss|rss2|atom)/?$";s:40:"index.php?s=$matches[1]&feed=$matches[2]";s:32:"search/(.+)/page/?([0-9]{1,})/?$";s:41:"index.php?s=$matches[1]&paged=$matches[2]";s:14:"search/(.+)/?$";s:23:"index.php?s=$matches[1]";s:47:"category/(.+?)/feed/(feed|rdf|rss|rss2|atom)/?$";s:52:"index.php?category_name=$matches[1]&feed=$matches[2]";s:42:"category/(.+?)/(feed|rdf|rss|rss2|atom)/?$";s:52:"index.php?category_name=$matches[1]&feed=$matches[2]";s:35:"category/(.+?)/page/?([0-9]{1,})/?$";s:53:"index.php?category_name=$matches[1]&paged=$matches[2]";s:17:"category/(.+?)/?$";s:35:"index.php?category_name=$matches[1]";s:42:"tag/(.+?)/feed/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?tag=$matches[1]&feed=$matches[2]";s:37:"tag/(.+?)/(feed|rdf|rss|rss2|atom)/?$";s:42:"index.php?tag=$matches[1]&feed=$matches[2]";s:30:"tag/(.+?)/page/?([0-9]{1,})/?$";s:43:"index.php?tag=$matches[1]&paged=$matches[2]";s:12:"tag/(.+?)/?$";s:25:"index.php?tag=$matches[1]";s:47:"author/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:50:"index.php?author_name=$matches[1]&feed=$matches[2]";s:42:"author/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:50:"index.php?author_name=$matches[1]&feed=$matches[2]";s:35:"author/([^/]+)/page/?([0-9]{1,})/?$";s:51:"index.php?author_name=$matches[1]&paged=$matches[2]";s:17:"author/([^/]+)/?$";s:33:"index.php?author_name=$matches[1]";s:69:"([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/feed/(feed|rdf|rss|rss2|atom)/?$";s:80:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&feed=$matches[4]";s:64:"([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/(feed|rdf|rss|rss2|atom)/?$";s:80:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&feed=$matches[4]";s:57:"([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/page/?([0-9]{1,})/?$";s:81:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&paged=$matches[4]";s:39:"([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/?$";s:63:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]";s:56:"([0-9]{4})/([0-9]{1,2})/feed/(feed|rdf|rss|rss2|atom)/?$";s:64:"index.php?year=$matches[1]&monthnum=$matches[2]&feed=$matches[3]";s:51:"([0-9]{4})/([0-9]{1,2})/(feed|rdf|rss|rss2|atom)/?$";s:64:"index.php?year=$matches[1]&monthnum=$matches[2]&feed=$matches[3]";s:44:"([0-9]{4})/([0-9]{1,2})/page/?([0-9]{1,})/?$";s:65:"index.php?year=$matches[1]&monthnum=$matches[2]&paged=$matches[3]";s:26:"([0-9]{4})/([0-9]{1,2})/?$";s:47:"index.php?year=$matches[1]&monthnum=$matches[2]";s:43:"([0-9]{4})/feed/(feed|rdf|rss|rss2|atom)/?$";s:43:"index.php?year=$matches[1]&feed=$matches[2]";s:38:"([0-9]{4})/(feed|rdf|rss|rss2|atom)/?$";s:43:"index.php?year=$matches[1]&feed=$matches[2]";s:31:"([0-9]{4})/page/?([0-9]{1,})/?$";s:44:"index.php?year=$matches[1]&paged=$matches[2]";s:13:"([0-9]{4})/?$";s:26:"index.php?year=$matches[1]";s:58:"[0-9]{4}/[0-9]{1,2}/[0-9]{1,2}/[^/]+/attachment/([^/]+)/?$";s:32:"index.php?attachment=$matches[1]";s:68:"[0-9]{4}/[0-9]{1,2}/[0-9]{1,2}/[^/]+/attachment/([^/]+)/trackback/?$";s:37:"index.php?attachment=$matches[1]&tb=1";s:88:"[0-9]{4}/[0-9]{1,2}/[0-9]{1,2}/[^/]+/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:83:"[0-9]{4}/[0-9]{1,2}/[0-9]{1,2}/[^/]+/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$";s:49:"index.php?attachment=$matches[1]&feed=$matches[2]";s:83:"[0-9]{4}/[0-9]{1,2}/[0-9]{1,2}/[^/]+/attachment/([^/]+)/comment-page-([0-9]{1,})/?$";s:50:"index.php?attachment=$matches[1]&cpage=$matches[2]";s:57:"([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/([^/]+)/trackback/?$";s:85:"index.php?year=$matches[1]&monthnum=$matches[2]&day=$matches[3]&name=$matches[4]&tb=1";s:77:"([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})/([^/]+)/feed/(feed|rdf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Hi YogieAnamCara,

I’d love to track this down. Let me make some guesses based on what I saw.

The second set of rules did come from the main site, but it doesn’t at all appear that the first did.

I imagine that ngg_tag is the name of the site. Additionally, eine-seite is the slug of a page, and you’re also running /blog/%postname%/ as a permalink structure.

How close am I? What am I wrong about? (Probably most of it — I just need some answers.)

Nacin

I imagine that ngg_tag is the name of the site.

It looks like a taxonomy added by NextGEN Gallery plugin, FWIW:

// Register the NextGEN taxonomy
$args = array(
	'label' => __('Picture tag', 'nggallery'),
	'template' => __('Picture tag: %2$l.', 'nggallery'),
	'helps' => __('Separate picture tags with commas.', 'nggallery'),
	'sort' => true,
	'args' => array('orderby' => 'term_order')
	);

register_taxonomy( 'ngg_tag', 'nggallery', $args );

Hi Nacin,

actually the first set I posted is the one that was written by the root site I suppose. As after I ran the blogs update a click on any post title brought up an 404 error.

Recognized that I went to the sub blog with the 404 errors. I went to the permalink structure and hit update and at the sub blog the 404 error were gone. The changes that were made can be seen in my second dump out of the DB.

ngg_tag is simply something from the NextGen Gallery Plugin.

the /%postname%/ is the permalink from the root blog and the root blog is not in use respectively it only has a site and a post nothing more.

the sub blogs permalink structure ist year, month and postname.

/(eine-seite)/ is I suppose from the root site /wp-admin/ms-options.php page and seems to be the slug for the first page setting here, so when creating a new sub blog this is taken from the settings there right?
Or this the choosen translation for /blog/ as the blogs site name or slug? (Not my translation!)
What pops up into my mind with that, is it possible that it has to do something with the WP translation packages as I have the German WP package as root installed?

Joerg

Just to mention the 404 errors also exist after any update in any sub blogs where the NextGen Gallery Plugin is not activated!

For those that may still have the issue of needing to update their sub-blogs – I found this to work perfect for me. It plays off of the response from Ipstenu. I created a MU Plugin:

[Code moderated as per the Forum Rules. Please use the pastebin]

The update_siteurl function was so I can include https prefix on all of my sites. You can remove the update_blog_option function and you should be fine. Just run it once and you’re good to go! Hopefully…!

Hope this helps! Im running 3.0.4