Upgrade Unicorn to v5.5.1
This upgrade fixes a problem that caused a single listener to monopolize a Unicorn worker. By default, GitLab Omnibus configures Unicorn to listen both on a UNIX domain socket and a TCP socket. One of those sockets can be starved if many requests are queued (https://yhbt.net/unicorn-public/20200416092457.GA5000@dcvr/).
Full list of changes: https://github.com/defunkt/unicorn/compare/v5.4.1...v5.5.5
Closes #213257 (closed)
Changes worth reviewing in detail
Edited by Stan Hu