hobbit.sh stop does no kill vmstat

when I do ./hobbit.sh stop, vmstat is not killed: $ ps xw |grep hobbit 26903 ? S 0:00 sh -c vmstat 300 2 1>/users/monitor/local/hobbit/client/tmp/hobbit_vmstat.my-host.26883 2>&1; mv /users/monitor/local/hobbit/client/tmp/hobbit_vmstat.my-host.26883 /users/monitor/local/hobbit/client/tmp/hobbit_vmstat.my-host

I noticed that if I do several "hobbit.sh restart", there will be extra vmstat processes running. For now I am manually killing them via "pkill vmstat" (on linux), after I stop or restart Hobbit.

-Charles