ResolutionYou need to take a look at Apache log file to track down the issue
This issue might be caused by mod_throttle Apache module and you will see the following error messages in this case.
critical_release() failed: Invalid argument
critical_acquire() failed: Invalid argument
To avoid it, you can disable mod_throttle module. Please, comment out the following line in the $PRODUCT_ROOT/apache/conf/httpd.conf file and restart Apache service.
This line should be commented out.
# /usr/local/psa/rc.d/httpd restart