First little thing I ran into - that I did not have with 2.4.12 is this: root@x065:[/data/prj/apache/httpd/test]/opt/httpd/sbin/apachectl start AH00534: httpd: Configuration error: More than one MPM loaded.
Granted, I should perhaps change to pre-fork (I noticed some had only tested that) - but I had 'adopted' MPM when 2.4.0 first came out. root@x065:[/data/prj/apache/httpd/test]grep -i mpm /etc/httpd/httpd.conf LoadModule mpm_prefork_module libexec/mod_mpm_prefork.so LoadModule mpm_worker_module libexec/mod_mpm_worker.so # Server-pool management (MPM specific) #Include /etc/httpd/extra/httpd-mpm.conf p.s. I had done configure with: $ ./configure --enable-layout=AIX --with-apr=/opt/bin/apr-1-config --with-apr-util=/opt/bin/apu-1-config --enable-mpms-shared=all --enable-mods-shared=all --disable-lua --enable-load-all-modules --enable-maintainer-mode --with-ssl