Apache reload kills apache

Since last week, every time I reload apache with /etc/init.d/apache reload the server dies:

[notice] SIGUSR1 received. Doing graceful restart accept_mutex_on: Identifier removed
[notice] Apache/1.3.33 (Debian GNU/Linux) mod_ssl/2.8.22 OpenSSL/0.9.7d mod_gzip/1.3.26.1a PHP/4.3.10-12 configured -- resuming normal operations
[notice] Accept mutex: sysvsem (Default: sysvsem)
[alert] Child 20340 returned a Fatal error... \nApache is exiting!

To start it again I must do a "killall -9 apache" and "/etc/init.d/apache start". Any ideas of what is going on?

Thanks,

 

 

 

 

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