/usr/local/lib/ruby/gems/1.9.1/gems/delayed_job-2.1.1/lib/delayed/command.rb:62:in `mkdir': File exists - /my_app/server/releases/20101120001612/tmp/pids (Errno::EEXIST)

这是capistrano代码(注意：我已经尝试了启动/重新启动命令)

after "deploy:restart","delayed_job:start"
task :start,:roles => :app do          
  run "cd #{current_path}; RAILS_ENV=#{rails_env} script/delayed_job -n 2 start"
end

来自部署日志的更多详细信息错误 –

executing command
 [err :: my_server] /usr/local/lib/ruby/gems/1.9.1/gems/delayed_job-2.1.1/lib/delayed/command.rb:62:in `mkdir': File exists - /my_app/server/releases/20101120001612/tmp/pids (Errno::EEXIST)
 [err :: my_server] from /usr/local/lib/ruby/gems/1.9.1/gems/delayed_job-2.1.1/lib/delayed/command.rb:62:in `daemonize'
 [err :: my_server] from script/delayed_job:5:in `<main>'
    command finished
Failed: "sh -c 'cd /my_app/server/current; RAILS_ENV=production script/delayed_job -n 3 restart'" on myserevr

这是一个Rails 3应用程序(v3.0.3)