fix for unicorn usr2 signal handling

config/unicorn/production.rb

@@ -24,18 +24,18 @@ stdout_path "/dev/null"
 # Set master PID location
 pid "#{app_path}/tmp/pids/unicorn.pid"
 
-# before_fork do |server, worker|
-#   ActiveRecord::Base.connection.disconnect!
+before_fork do |server, worker|
+  ActiveRecord::Base.connection.disconnect!
 
-#   old_pid = "#{server.config[:pid]}.oldbin"
-#   if File.exists?(old_pid) && server.pid != old_pid
-#     begin
-#       Process.kill("QUIT", File.read(old_pid).to_i)
-#     rescue Errno::ENOENT, Errno::ESRCH
-#       # someone else did our job for us
-#     end
-#   end
-# end
+  old_pid = "#{server.config[:pid]}.oldbin"
+  if File.exists?(old_pid) && server.pid != old_pid
+    begin
+      Process.kill("QUIT", File.read(old_pid).to_i)
+    rescue Errno::ENOENT, Errno::ESRCH
+      # someone else did our job for us
+    end
+  end
+end
 
 # after_fork do |server, worker|
 #   ActiveRecord::Base.establish_connection