HELP : File Descriptor -- URGENT

[sonam . singh]

Hi   This is my first message to the mailling list. I am runnig the apache1.3.29+Vignette5.0 at solaris 8.0 . Whenever I hup the apache file descriptor gets increased by 2 . But before the hup, no of descriptor are 260 or 256 . After hupped the descriptor become 262 .After certain period of time apache start throwing the error 'Too many file open..'. In httpd.conf we have only one virtual host entry but there is no logging enable.   I would like to know.Why the file descriptor increases by 2. Which are open files.How can i find the specific additional open file descriptor after the hup. I used the tools lsof,truss,pldd but i am not able to figure it out the root cause.   Plesae provide me the neccessary input.   regards Sonam Singh