Too many open files error on an OpenShift node

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Issue

OpenShift node becomes unstable with errors showing too many open files

hostname atomic-openshift-node: E0517 11:27:06.061459    2915 manager.go:212] Registration of the raw container factory failed: inotify_init: too many open files

$systemctl restart docker
Error: Too many open files

Environment

Red Hat OpenShift 3.1.1

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