Bug 25418

Server version: Apache/2.0.48
OSystem version: HP-UX B.11.00 U 9000/800 unlimited-user license
During normal users activity there is this situation on my server:
root 19920     1  0 07:09:24 ?        0:01 /usr/local/apache2/bin/httpd -k start
www 19946 19920  0 07:09:45 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 20199 19920  0 07:12:29 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 19923 19920  0 07:09:25 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 19925 19920  0 07:09:25 ?         0:08 /usr/local/apache2/bin/httpd -k start
www 19922 19920  0 07:09:25 ?         0:05 /usr/local/apache2/bin/httpd -k start
www 21517 19920  0 07:30:05 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 19924 19920  0 07:09:25 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 19945 19920  0 07:09:45 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 19944 19920  0 07:09:44 ?         0:06 /usr/local/apache2/bin/httpd -k start
www 19921 19920  0 07:09:25 ?         0:06 /usr/local/apache2/bin/httpd -k start

after approximatly 50 minutes of activity the http process going to die and 
this is the messages in APACHEHOME/logs/error_log file.

[Tue Dec 09 08:01:58 2003] [emerg] (28)No space left on device: couldn't grab th
e accept mutex
[Tue Dec 09 08:01:58 2003] [alert] Child 7319 returned a Fatal error...
Apache is exiting!
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:58 2003] [emerg] (36)Identifier removed: couldn't grab the acc
ept mutex
[Tue Dec 09 08:01:59 2003] [emerg] (22)Invalid argument: couldn't grab the accep
t mutex
[Tue Dec 09 08:02:10 2003] [emerg] (22)Invalid argument: couldn't grab the accep
t mutex
[Tue Dec 09 08:02:11 2003] [emerg] (22)Invalid argument: couldn't grab the accep
 ecc. ecc. for every httpd process....

i don't have any file system near 100% used space; i don't have applied any 
patch of httpd (i have the most recent version); my c compiler is the cc ansi c 
compile of HP-UX 11.00;
please help me

thanks.