Hi,

We performed no updates on our infrastructure and since today, on some guests (not all), we see the following error in the libvirtd logs

140085012483328:error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640:
(process:375537): Spice-WARNING **: reds-stream.c:469:reds_stream_ssl_accept: SSL_accept failed, error=1

Other guests works fine.

We are trying from Mac with remote-viewer and we use 

OS Version:
RHEL - 7 - 4.1708.el7.centos
OS Description:
CentOS Linux 7 (Core)
Kernel Version:
3.10.0 - 693.el7.x86_64
KVM Version:
2.10.0 - 21.el7_5.3.1
LIBVIRT Version:
libvirt-3.9.0-14.el7_5.5
VDSM Version:
vdsm-4.19.45-1.el7.centos
SPICE Version:
0.14.0 - 2.el7_5.3
CEPH Version:
librbd1-0.94.5-2.el7

And latest virt-viewer.

Could anybody help us to the right direction?

Currently, we cannot access the console of those VMs and we have no idea why.

Thanks,
Trefex