Hi,
 I've got some Apache Children that are getting stuck on a futex
call. This started happening on a Apache 2.2.6 worker w/ mod_per
2.0.4 install, so I upgraded to Apache 2.2.11 worker w/ mod_perl 2.0.4
and it still continues. I have modules for proxy and php installed as
well, but this problem only presents when using mod_perl and
MaxRequestsPerChild. If I remove mod_perl the Apache children close
as expected. It's easily replicated using an abusive ab test and
turning down MaxRequestsPerChild. I know I could turn off
MaxRequestsPerChild, but I have that on to deal with PHP's poor thread
handling and memory leaks. I could switch to prefork, but the servers
I have don't have enough RAM to handle the load I need them too. Any
help would be appreciated.

This child appears to be waiting for PID 3451, but that PID no longer
exists.

[sthorne@(protected)
Process 3271 attached - interrupt to quit
futex(0x1b5bbe8, FUTEX_WAIT, 3451, NULL

Thanks,
Sean