• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Watchdog Failed to Connect to Database

M

menthol

Guest
I have resisted posting this because the Watchdog error that I am getting is rather obvious:

db_connect: failed to connect to database: Error: Client does not support authentication protocol requested by server; consider upgrading MySQL client

With so many people having problems with 8.1 full installs or upgrades, I felt rather lucky that this is the only problem I have encountered and have left it to the updater to hopefully produce a fix.

After the last two Plesk updates this error is still being reported every night and my research has come to the conclusion that this is a password hash length problem with MySQL.

I remember having to fix my passwords manually (for other MySQL applications) when I upgraded MySQL on my own quite a few months back before Plesk supported MySQL 5 but now I do not wish to fool around with Plesk 8.1 as I fear I may create more problems.
 
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