WordPress DB Update request loop

Have you tried manually updating the WP?

If not, try MANUALLY updating. Download a fresh copy of the WordPress .zip file to your computer, unzip it, and use that to copy up all files and folders EXCEPT the wp-config.php file and the /wp-content/ directory. You may need to delete the old wp-admin and wp-includes folders and files on your server before uploading the new ones. Please read the Manual Update directions first.

Backup: If you haven’t already done, always backup everything (including your database) before doing any actions, just in case something really goes wrong. You can never have enough backups!

yes, sadly manual upgrade was the first thing I tried…
of course I have backup of everything, but I would like not to make a clean install

Have you also tried:
– Flushing any caching plugins you might be running, as well as server and/or browser caches. Not just your browser, but any op cache or content network cache as well such as Cloudflare. If your host provider has a “Purge Varnish” option or if you can ask your provider to flush memcache on your server.
– If that does not resolve the issue, try deactivating ALL (yes all) plugins temporarily to see if this resolves the problem (plugin functions can interfere). If this works, re-activate them individually (one-by-one) to find the problematic plugin(s).
– If that does not resolve the issue, or if you can’t get into your admin dashboard, try resetting the plugins folder by FTP. Sometimes, an apparently inactive plugin can still cause problems. Also remember to deactivate any plugins in the mu-plugins folder (if you have created such folder). The easiest way is to rename that folder to mu-plugins-old.
– If that does not resolve the issue, keep all plugins deactivated and try switching to the unedited default Theme (Twenty Seventeen) for a moment using the WP dashboard to rule out any theme-specific issue (theme functions can interfere like plugins). If you don’t have access to your admin area, use FTP , or your web-host’s cPanel or whatever file management application your host provides (no Dashboard access required). Navigate to /wp-content/themes/ and switch to the default theme by renaming your current theme’s folder by adding “-old” to the end of the folder name. Alternately, you can remove other themes except the default theme. That will force your site to use it.

by now solved manually updating DB version with a query:
UPDATE wp_vela_options SET option_value = ‘38590’ WHERE option_name = ‘db_version’

but I want to understand what happened

I checked open tickets for the next minor release.

I could not find any ticket on this issue you have described.

That suggests it’s probably not a common issue.

Rather, it’s likely to be specific to your installation/server.

I think the DB update problem is due to MySql problems on the server, thanks everyone for the help

I think the DB update problem is due to MySql problems on the server

What were the “MySql problems”? Thanks

Performing MySql columns analisys I received [Got error 28 from storage engine] error from both phpMyAdmin and WordPress with debug enabled, I think that update to Wp 4.7 version tried to do some column size change and, failing, Wp didn’t update version number in options table.

By now hosting provider is fixing it (pheraps due to some .myi corruption), please notice that database is working and wordpress website is online.