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Site owner updated her multisite yesterday via the dashboard. The site itself is still running, but the network and primary site dashboard both return a 500 error. However, the wp-admin for two subdomain sites can be accessed just fine.

The related PHP errors showing up are these:

[Mon Apr 27 23:36:21 2015] [warn] [client x.x.x.x] mod_fcgid: read data timeout in 45 seconds

[Mon Apr 27 23:36:21 2015] [error] [client x.x.x.x] Premature end of script headers: update-core.php

Anyone seen this or have any idea?

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  • I should mention that I have tried disabling all plugins and changing the twentyfifteen but still getting the same issue.
    – John Chandler
    Commented Apr 29, 2015 at 1:01
  • Another update: after rolling the site back to a 4.1.4, everything works again. Ran another automatic update from there and it broke again.
    – John Chandler
    Commented Apr 29, 2015 at 2:23
  • Isn't your issue solved - wordpress.org/support/topic/… ?
    – denis.stoyanov
    Commented Feb 27, 2016 at 13:28

2 Answers 2

Reset to default
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based on https://wordpress.org/support/topic/wp-admin-returning-500-errors-after-update-to-421, seems like it was related to the conversions of tables to utf8mb format done in 4.2 which timeout when there are many comment.

Possible solutions: make the DB upgrade on some staging server in which all timeouts are off, or increase the timeout on the production server until it works.

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Delete the .htaccess in wordpress root should bring site back up reset permalinks admin - settings - permalinks. If you don't see the htaccess file it is likely hidden you have to select show hidden files in whatever method you use to view files

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  • Unfortunately, not a fix. I had already tried that but tried it again just because.
    – John Chandler
    Commented Apr 29, 2015 at 1:01

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