Veeam Backups suddenly failing (can't connect to vCenter)

Thuleman

Supreme [H]ardness
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Got me a bit stumped, installed Veeam some three weeks ago and it's been largely flawless except for a couple issues which were user error on my part.

Then tonight backups failed across the board.

Code:
[25.04.2011 23:38:18] <01> Error    Failed to login to "10.10.27.10" by SOAP, port 443, user "Vcenter\Administrator", proxy srv: port:0   at Veeam.Backup.ViSoap.CServiceSession.Create(CServiceConnSpec connSpec)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.ViSoap.CSoapService..ctor(String host, Int32 port, String user, String password, String proxyHost, Int32 proxyPort)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.ViSoap.CSoapConnection..ctor(String host, Int32 port, String user, String password, Boolean useProxy, String proxyHost, Int32 proxyPort)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.Core.SSoapConnection.Create(CDBHost host)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.Core.CHierarchyCache.GettingHierarchy(CDBHost host)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.Common.CacheBase`3.Get(GettingArg arg)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.Core.VmListBuilder.Build(CDbObjectInfo dbObject)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.Core.CVmTaskBuilder.ExpandOij(CObjectInJob[] excludedOijs, List`1 errList)
[25.04.2011 23:38:18] <01> Error    Unable to connect to the remote server   at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
[25.04.2011 23:38:18] <01> Error       at System.Net.WebClient.DownloadString(Uri address)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.ViSoap.CClientConfig.CreateFromHost(CServiceConnSpec connSpec)
[25.04.2011 23:38:18] <01> Error       at Veeam.Backup.ViSoap.CServiceSession.Create(CServiceConnSpec connSpec)
[25.04.2011 23:38:18] <01> Error    A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 10.10.27.10:443   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
[25.04.2011 23:38:18] <01> Error       at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)

I didn't change anything as far as I can tell. MS updates were applied but the backup ran last night just fine. I can ping 10.10.27.10 from the Veeam box fine, as far as I can tell the vCenter is running normally. Strange.

Will monkey with it for a few minutes in the morning and put in a ticket if I can't get to the bottom of it myself.
 
Can you open a browser on your Veeam Backup server and connect to the vCenter server's IP using https://10.10.27.10?

If not, check to see if there's a firewall enabled on either box and that both the vCenter Server and Management Webservices services are running on your vCenter server.
 
I was just too tired last night to see what was going on and my previous "vCenter is running normally" was false. In fact, vCenter wasn't running at all, which explains the Veeam problem since it really couldn't connect to it. So this was user error on my part in properly diagnosing it at the time. I'll make a new post about why vCenter suddenly stopped working.
 
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