Ubuntu Virtual machine installation GitLab appears after "Whoops, GitLab is taking too much time to respond."

Online for a long time, there is said 8080 port by Tomcat occupied, but after the removal of Tomcat will still report this error.

https://www.kittell.net/code/gitlab-502-whoops-gitlab-is-taking-too-much-time-to-respond/

Above this article is said as long as the run

sudo gitlab-ctl restart

Or

sudo gitlab-ctl reconfigure

can be done, but I can't do it.

Later saw that there is a virtual machine installed Ubuntu, memory at least 2G to be able.

Change the memory to 2G, then restart Gitlab--restart or reconfigure, solve the problem.

Ubuntu Virtual machine installation GitLab appears after "Whoops, GitLab is taking too much time to respond."