Hi,Thanks for the quick reply.Version before the update was the latest 4.1.The storage is NFS.The host are plain 7.4 Centos.i keep them up to dateif i remenber the initail deploy of the engine vm was full OSThe step to upgrade was:SSH to hosted engine vm ,yum install 4.2 releaserun engine-setup.this where i think something when wrong.the engine setup was not able to update some certificate.. a quick search on the internet and found that moving the ca.pem from the /etc/pki/ovrit-engine made the engine-setup work..from that point the hosted_engine seem to work fine but all hosts and data center are not operational.One of my main concern is losing all the template and users vm..Engine and vdsm log of one host are here..In the engine log there is a lot of this error..2018-01-06 08:31:40,459-05 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker. GetCapabilitiesVDSCommand] (EE-ManagedThreadFactory- engineScheduled-Thread-9) [] Command 'GetCapabilitiesVDSCommand( HostName = hosted_engine_2, VdsIdAndVdsVDSCommandParameter sBase:{hostId='7d2b3f49-0fbb- 493b-8f3c-5283566e830d', vds='Host[hosted_engine_2, 7d2b3f49-0fbb-493b-8f3c- 5283566e830d]'})' execution failed: VDSGenericException: VDSNetworkException: General SSLEngine problem. Thanks for your supportCarlOn Sat, Jan 6, 2018 at 8:50 AM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:On Sat, Jan 6, 2018 at 2:42 PM, carl langlois <crl.langlois@gmail.com> wrote:Hi again all,I really need your input on recovering my failed upgrade to 4.2.First two things to do to get appropriate help would be, in my opinion:1) provide a detailed description of your environmentexact version before the update; kind of storage (Gluster, NFS, iSCSI, FC), kind of hosts (plain OS and which version or node-ng and which version before and after), kind of deploy executed for hosted engine VM at initial install time (appliance, full OS).Describe steps used for upgrading.2) upload to a shared file services all the possible logs:engine logs before and after the upgrade and logs of engine-setup run during updatevdsm logs before and after the upgradeGianluca