I encountered the same issue running the docker-based cloudera quickstart on a AWS EC2 instance and accessing from my local computer.  The resolution was as follows:   Ensure that the hostname `quickstart.cloudera` resolves to the appropriate IP address.  I forced this by manually editing the `/etc/hosts` file locally (on a mac) Figure out / ensure that MySQL is listening on port 3306 within the container (`netstat -lntp` within the container to check this) Ensure that traffic at port 3306 on the host passes through to the container appropriately.  This amounts to adding `-p 3306:3306` to the `docker run` command   It seems that the Hue UI wants to access the MySQL database directly, which is a bit strange to me... in any case, that means that the client computer / browser needs to be able to access the MySQL database at `quickstart.cloudera:3306`.  Hope that helps, even if long after the fact! ... View more