Check with bash whether your Resque workers run from the current release folder.

check_resque_current.sh

releases=`ps aux | grep resque- | sudo pwdx \`awk '{print $2}'\` | sed 's/\(.*\)\/path\/to\/releases\/\(.*\)/\2/' | sed 's/.*No such process//'`
current_release=`readlink /path/to/current | sed 's/\/path\/to\/releases\/\(.*\)/\1/'`


for r in $releases; do
  if [ $r = $current_release ]; then
    echo 'yes'
  else
    echo 'no'
  fi
done

check_resque_current_single.sh

for r in `ps aux | grep resque- | sudo pwdx \`awk '{print $2}'\` | sed 's/\(.*\)\/path\/to\/releases\/\(.*\)/\2/' | sed 's/.*No such process//'`; do if [ `readlink /path/to/current | sed 's/\/path\/to\/releases\/\(.*\)/\1/'` = $r ]; then echo 'yes'; else echo 'no'; fi; done