Why does kernel installation fails with the error "emcpmgr create_db command failed for emcpowera" ?

Issue

• The installation of kernel fails with the error emcpmgr create_db command failed for emcpowera.

# yum install kernel 

  Installing : kernel-3.10.0-957.12.1.el7.x86_64                                                                                              1/1
emcpmgr create_db command failed for emcpowera
mkinitrd failed
ERROR: installing kernel-3.10.0-957.12.1.el7.x86_64: no space left for creating initramfs. Clean up /boot partition and re-run '/usr/sbin/new-kernel-pkg --package kernel --mkinitrd --dracut --depmod --install 3.10.0-957.12.1.el7.x86_64'
warning: %posttrans(kernel-3.10.0-957.12.1.el7.x86_64) scriptlet failed, exit status 1
Non-fatal POSTTRANS scriptlet failure in rpm package kernel-3.10.0-957.12.1.el7.x86_64
  Verifying  : kernel-3.10.0-957.12.1.el7.x86_64                                                                                              1/1

Installed:
  kernel.x86_64 0:3.10.0-957.12.1.el7

Complete!