Vmware vsphere client 6.5 cannot connect to esxi

I have carried out the test, that I have described earlier in this discussion (move one or more virtual guests from the 'healthy' ESX hosts to the disconnected one via un-register/re-register) and I now know beyond any doubt that the disconnected host is running absolutely fine 'on-its-own' (it just doesn't get managed by the Virtual Center system). I am attaching a small sample of these logs to this message, so that other people reading this discussion have a chance to look at it ('' is the hostname of the system in question). However, I have noticed that I can connect the vSphere client directly to the disconnected host and, then again, the host seems to be OK - so, later today (when computing loads get lower) I am going to un-register a less-mission-critical (test-and-development) system from a 'healthy' host and re-register it into the disconnected one and see what happens.ДЄlso, I have dug into the logs of the Virtual-Center server and I have noticed that there are several messages stating 'Marked (hostname) as dirtyп»ї' (which may relate to my problem, since no such messages are generated for any other host of my cluster).

Restarting the VMWARE management services via command-line on the server ('service mgmt-vmware restart' and 'service vmware-vpxa restart') did not resolve the problem.ДЄdvice is always welcome - thanks in advance.ДЄctually, while the host is running fine, there are no running VM's on it - so, I have no way of knowing whether I would really be able to connect to a virtual guest running on this host. Same thing happens whenever I re-connect that server to the cluster (by right-clicking on its entity in the vSphere client and selecting 'Reconnect'). Whenever I reboot that server, it seems to be connected to the cluster ('Connected' state and 'Normal' status) for a few seconds (less than 1 minute) and then goes into 'Not responding' state. п»ї During the last few weeks, I have a problem in our VMWARE ESX cluster (Rel.3.5, build 207095): 1 of the 9 servers appears as disconnected in the vSphere client of our vCenter Server (both: Rel.4.0.0, build 258672), while it seems to have a normal operation (the ESX Server console is displayed on the system's screen, it accepts login connections and any Linux command via SSH and it seems to have access to all the VMFS volumes on the shared storage engines).

Vmware vsphere client 6.5 cannot connect to esxi