On Mon, Nov 1, 2021 at 1:47 AM Son, Tran Ngoc <[email protected]> wrote:
> Dear all, > > My Apache Guacamole has been shutdown unplanned. Now it has the following > error: > > > > [http-nio-8080-exec-4] ERROR o.a.g.rest.RESTExceptionMapper - Unexpected > internal error: > > ### Error querying database. Cause: > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications > link failure > > > I would make sure your MySQL or MariaDB server is running correctly. The error indicates that the JDBC extension cannot contact the database server. -Nick >
