Apache Hanging in Linux 3.0

Hi,
I am using RedHa Linux 2.4.21-20.0.1.ELsmp #1
and using Apache 2.046 which comes bundled with this red Hat.
My apache processess are hanging at random.
When I do strace -p pid I am getting following :

Process 11819 attached - interrupt to quit
futex(0x7d41bf8, FUTEX_WAIT, 11864, NULL <unfinished ...>

So apache is not responding to any requests at all at this moment.

Also, the parent apache process which is in httpd.pid file is no more living
(already killed for no reasons) so when I try to stop the apache using
apachectl -k stop command it is complaining that it can nto stop as no pid
running.

I am using worker MPM in apache.

PLease help me out

Thanks

Deepak

Deepak,

Did u try taking the thread dump of the processes ?

Typically in HP-UX, I do "kill -3 <Unix PID>" to get the thread dumps of all the processes on stdout.

Thread Dump might provide you with more detail in resolving this issue.

Hope this helps,
Deepak