Environment: Centos 7 Boot Process

Error : System Hanging at “Starting Switch Root”,Boot fails.

Solution: Replace/Reinstall glibc-x.x.x.el7.x86.64 package after boot your server with centos rescue dvd / cd / iso image

rpm -ivh –root=/mnt/sysimage –replacefiles –replacepkgs /run/install/repo/Packages/glibc-x.x.x.el7.x86.64.rpm