a.) try re-installing Bukkit.
b.) Check plugin incompatibilities with eachother (I don't think this would matter but try it)
c.) increase process priority ni task manager for the javaw.exe bound to the server.
If it still doesn't work, I'm not sure what to do. When my computer has to little RAM I get this message a lot, so that might be the problem. Your world / server has gotten too large for your server. (possibly)
b.) Check plugin incompatibilities with eachother (I don't think this would matter but try it)
c.) increase process priority ni task manager for the javaw.exe bound to the server.
If it still doesn't work, I'm not sure what to do. When my computer has to little RAM I get this message a lot, so that might be the problem. Your world / server has gotten too large for your server. (possibly)
several times a day, why?