Questions about stopping the server on linux

[凌晨]

We built a server on mina framework then running in linux(red hat as4 update 2).Everytime We user ‘kill’ to stop this server there are always several tcp connections in FINWAIT.In this condition we restart the server a address already bind Exception will be thrown.So please tell me how to fix this problem.Otherwise we can only restart the server after a long time,waiting for the FINWAIT.Thanks a lot