Not able to log into Vsphere (Vcenter server) The request failed because of a connection failure

HI

We use VMware and use vSphere appliance and I was able to login into the server successfully last week.
Now if I log in, it says with a red x mark windows.
“Could not connect vSphere Client could not connect to VCT-Server
An unknown connection error occurred. ( The request failed because of a connection failure.( Unable to connect to the remote server)”

I logged into the ESX host whre the Vcenter appliance is hosted and on the server summary it says
VMware tools : Not running
IP address is .... Blank
DNS name :.. blank
State : Powered on

Any help to resolve this would be great.
Thanks
lianne143Asked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Try a restart of the vCenter Appliance?
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lianne143Author Commented:
Thanks Andrew
I right clicked the vCenter Appliance and opened the console
The arrow keys to navigate are not responding and If I Right click power off and Power on again , will this be ok to restart the vCenter Appliance this way.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes if you force a power off and restart I would start the troubleshooting if it does not startup correctly after 30 minutes

Is this a new installation or old?

Also checking Appliance storage space is wise the database has not filled the disk causing the failure
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lianne143Author Commented:
This is a old installation and it was working good last week.
The free space on the storage where the vCenter appliance hosted is 1.3TB
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Restart after 30 minutes it should have initialised and all working otherwise check inside the appliance storage space!
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lianne143Author Commented:
Thanks you so much Andrew

After restating the vCenter server, I am able to log into the vCenter now :)
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Very good
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lianne143Author Commented:
I don't remember restarting the vCenter appliance since we implemented 4 years before. Is it necessary to restart the Vcenter periodically?
Thanks
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I would say not often but does depend on build version number of hosts and VMs
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lianne143Author Commented:
Thank you so much .
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Np
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