VMware vSphere Client could not connect to vCenter version 5.1.0

Recently we had an issue, where we were unable to connect to one of our VMware ESXi vCenter’s (v5.1.0) with vSphere Client. Everything worked, all virtual machines were up, except vCenter. Digging deeper, the log files revealed the following: 2014-09-19T09:01:09.494+03:00 [02156 warning ‘Default’] [VdbStatement] SQL execution failed: cleanup_events_tasks_proc 2014-09-19T09:01:09.494+03:00 [02156 warning ‘Default’] [VdbStatement] Execution elapsed …

VMware vSphere Client errors on Windows 7

Trying to start VMware vSphere Client on Windows 7 to connect ESX / ESXi machine or vCenter, throws two error boxes: Could Not Connect — Error parsing the server “vcenter.lan” “clients.xml” file. Login will continue, contact your system administrator. and Error — The type initializer for ‘VirtualInfrastructure.Utils.HttpWebRequestProxy’ threw an exception. Searched VMware forums without any …