[Wed May 20 11:52:46.444326 2015] [core:warn] [pid 30028:tid 140303528925056] AH00111: Config variable ${APACHE_LOG_DIR} is not defined
AH00526: Syntax error on line 74 of /etc/apache2/apache2.conf:
Invalid Mutex directory in argument file:${APACHE_LOCK_DIR}