Unicorn/Nginx process missing, socket open
问题 I am trying to deploy code using Capistrano, and it fails on deploy:start or deploy:stop because the Unicorn process is already killed. However if I try to cap deploy:start , I get a stderr claiming that Address already in use - /tmp/my_app.socket . How would this happen, and how might I get out of this mess? 回答1: Still not sure how this happens, but the following solution seems to work: lsof /tmp/my_app.socket - lists the pids kill -9 pid - (replace 'pid' with one of those listed) Then cap