Hi, I have upgraded one of my nodes to oVirt-node 4.4.0 and I am testing the basic functionality in preparation for the full cluster migration. Unfortunately snapshot deletions are not working at the moment; I have a live merge failure most of the times due to a libvirt error -- virDomainBlockCommit() failed I have opened a bug on this as well (https://bugzilla.redhat.com/show_bug.cgi?id=1840414) See the most relevant portion of the vdsm.log here: 2020-05-26 22:43:39,067+0100 ERROR (jsonrpc/1) [virt.vm] (vmId='baaf6be8-dcf4-4f26-b0f1-435287eeed95') Live merge failed (job: 7b96452b-0e60-46c6-9236-6b8a906b0ed8) (vm:5381) Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/vdsm/virt/vm.py", line 5379, in merge bandwidth, flags) File "/usr/lib/python3.6/site-packages/vdsm/virt/virdomain.py", line 101, in f ret = attr(*args, **kwargs) File "/usr/lib/python3.6/site-packages/vdsm/common/libvirtconnection.py", line 131, in wrapper ret = f(*args, **kwargs) File "/usr/lib/python3.6/site-packages/vdsm/common/function.py", line 94, in wrapper return func(inst, *args, **kwargs) File "/usr/lib64/python3.6/site-packages/libvirt.py", line 728, in blockCommit if ret == -1: raise libvirtError ('virDomainBlockCommit() failed', dom=self) libvirt.libvirtError: internal error: qemu block name 'json:{"backing": {"driver": "raw", "file": {"driver": "file", "filename": "/rhev/data-center/mnt/glusterSD/192.168.30.2:_Temp__Storage/246845e5-5546-4f04-948e-66a9532b403f/images/64955343-da61-4b76-9158-8df8363dc5a3/b0558698-bc82-4941-ac52-9fa2385a9f00"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "/rhev/data-center/mnt/glusterSD/192.168.30.2:_Temp__Storage/246845e5-5546-4f04-948e-66a9532b403f/images/64955343-da61-4b76-9158-8df8363dc5a3/be844ebe-10b6-4ac7-89c1-9f8526a52762"}}' doesn't match expected '/rhev/data-center/mnt/glusterSD/192.168.30.2:_Temp__Storage/246845e5-5546-4f04-948e-66a9532b403f/images/64955343-da61-4b76-9158-8df8363dc5a3/be844ebe-10b6-4ac7-89c1-9f8526a52762' 2020-05-26 22:43:39,075+0100 INFO (jsonrpc/1) [api.virt] FINISH merge return={'status': {'code': 52, 'message': 'Merge failed'}} from=::ffff:10.144.138.240,60914, flow_id=dbf9c831-e0cb-4891-a38c-d61136daf029, vmId=baaf6be8-dcf4-4f26-b0f1-435287eeed95 (api:54) 2020-05-26 22:43:39,075+0100 INFO (jsonrpc/1) [jsonrpc.JsonRpcServer] RPC call VM.merge failed (error 52) in 0.18 seconds (__init__:312) This issue was reported also on https://bugzilla.redhat.com/show_bug.cgi?id=1785939; according to the comments the resolution seems to be in libvirt 6.x. However I am not quite sure if / how I can get libvirt 6 in my setup... is there a test image (ideally ovirt-node) I can use? Any suggestions? Unrelated: I had also a problem during the hosted-engine deployment due to the fact the machine is not connected directly to internet and could not complete the dnf update steps (even with the proxy configured it was still failing at a later stage during the engine setup, same problem..). I might open another thread on it... Thanks, Marco