Your database does not support utf8mb4

Support & Bugs
1

Hi,

I have updated to Matomo 4.0.5.
The update, including the database updates, went fine, but when attempting to convert the DB to use utf8mb4, by running console core:convert-to-utf8mb4, I just get a “Your database does not support utf8mb4” message.

Looking at the script, it seems this has to do with utf8mb4 not being the default character set of our MySQL db - version 5.5.29, on RHEL.

I have tried setting the following parameters in my.cnf manually (and restarted), but without luck:

[client]
default-character-set=utf8mb4
[mysql]
default-character-set=utf8mb4
[mysqld]
character-set-server = utf8mb

Is there anything else I should have a look at, or is this an issue with our (old) version of MySQL?
Many thanks for any suggestions!

2

Hi,

https://mathiasbynens.be/notes/mysql-utf8mb4
claims that MySQL 5.5.3 is the first version supporting utf8mb4.

But of course it might be possible that whoever compiled your binary disable the feature at compile time.

3

Thanks!

It seems that adding the following settings in my.cnf solved the issue:

[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4

[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci