I don’t think that this is actually an error message, just a warning message that appears in all builds, even successful ones. However the problem I am having is that my builds are failing immediately after this warning. The builds were working fine less than 2 hours ago.
$ npm install --quiet --no-optional
WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
npm ERR! write after end
npm ERR! A complete log of this run can be found in:
npm ERR! /home/gitlab-runner/.npm/_logs/2018-10-31T04_05_56_968Z-debug.log
npm install --quiet --no-optional failed
Running after script...
$ run "clean-up"
Running Stage clean-up for Job: 6275123