Resolution
If you encounter issues with the web server, try restarting Apache which is the universal fix for such issues:/hsphere/shared/scripts/apache-reconfigThis script will try to fix all the possible problems and will start apache.
In case your web server crashed and does not restart with apache-reconfig, try to execute:
# killall -9 httpdand run apache-reconfig again.
If this does not help, go to the log files directory, and see if it contains files over 2GB in size. Remove them if there are any. In most cases error_log, su_exec & ssl_engine_log are the ones that need to be deleted. Then execute apache-reconfig again. Versions 2.1 and above will rotate these files automatically.