[ovirt-users] Host can not boot any more with current kernel

Hello everybody, Today I update my engine, from 4.2.1.6 to 4.2.1.7 and later I update two hosts. All are running on CentOS 7.4 Now they have the kernel 3.10.0-693.21, one host I can start normal and the other one always reboot short after the menu where I can select the kernel. There is not even an error message and I can not switch to the boot log screen. The same behavior I have with kernel 3.10.0-693.17. Kernel *.11 and older are working. Have any body experience this issue and know what to do? Regards Jonathan