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Oracle SQL Developer does not connect to MariaDB

User_OZIZZDec 31 2021 — edited Jan 1 2022

Hello
I am trying to connect to a database on an external server. This is MariaDB version 10.5.8. I am using the mysql-connector-java-8.0.27.jar connector.
All connection parameters are correct, host, user, password, port 3306, moreover, on the same links I use MySql Workbench 8.0.
When I test the connection it throws this error:

Status: Failure -Test failed: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

Interestingly, in the side panel it displays the full path and it is appended with: / null
that is, for example:
username @ // server.org:3306/null

Do you have any ideas?

Of course, I work as in the title on Oracle SQL Developer.

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Added on Dec 31 2021
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