I was working on an app (bundler, unicorn, Rails3) that had a strange deploy issue. Five deploys (using capistrano) after our unicorn processes had started unicorn would fail to restart, this is the capistrano output: * executing `deploy:restart' * executing `unicorn:restart' * executing "cd /u/apps/dash/current && unicornctl restart" servers: ["stats-01"] [stats-01] executing command ** [out