[xmonad] xmonad and dzen crashing

Hi, This is probably not directly xmonad related, sorry for that. Hi use xmonad dzen logger and start xmonad like this: xmonad | dzen2 -y -1 -ta l -bg "black" -expand right -e '' Sometimes my dzen statusbar disappears and I suspect, that it crashes. Can I somehow: 1. find out why it crashes? 2. restart it while xmonad is still running? Regards, Nathan