Hm... It seems that I missed the complain about libibverbs.so.1 which is part of package libibverbs-22.1-3.el7.x86_64 . Once I have deployed that, no more issues are observed. I guess there is a missing dependency. Best Regards, Strahil Nikolov On Sep 18, 2019 19:57, Strahil <hunter86_bg(a)yahoo.com&gt; wrote: > > Hello Community, > > I was waiting for 7.7 to come up before I upgrade my lab. > > The engine got upgraded  without issues, same for OS - but after the system powered up I receive the  following: > > [root@ovirt1 ~]# ssh engine > root@engine's password: > Last login: Wed Sep 18 19:48:32 2019 from ovirt1.localdomainnet_mlx5: cannot load glue library: libibverbs.so.1: cannot open shared object file: No such file or directory > net_mlx5: cannot initialize PMD due to missing run-time dependency on rdma-core libraries (libibverbs, libmlx5) > PMD: net_mlx4: cannot load glue library: libibverbs.so.1: cannot open shared object file: No such file or directory > PMD: net_mlx4: cannot initialize PMD due to missing run-time dependency on rdma-core libraries (libibverbs, libmlx4) > net_mlx5: cannot load glue library: libibverbs.so.1: cannot open shared object file: No such file or directory > net_mlx5: cannot initialize PMD due to missing run-time dependency on rdma-core libraries (libibverbs, libmlx5) > PMD: net_mlx4: cannot load glue library: libibverbs.so.1: cannot open shared object file: No such file or directory > PMD: net_mlx4: cannot initialize PMD due to missing run-time dependency on rdma-core libraries (libibverbs, libmlx4) > [root@engine ~]# > > Anyone else experiecing this  ? > I can't find libmlx4  or libmlx5 in the repos. > > P.S.: I have a gluster  snapshot, so I can rollback if needed. > For now I will postpone  my hosts' upgrade. > > Best Regards, > Strahil Nikolov