Unexpected SQL Server Reboot

Hi,

One of our test SQL Server (2008 Version) unexpectedly  rebooted. Server was stopped responding to ping and froze. I found below error in windows logs. is this just network disconnection? anyone encountered this error? Thanks.

Unable to update the database IDs for <SQLSERVERNAME> Error: System.Net.Sockets.SocketException: 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 999.999.999.999:9999

Server stack trace: 
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at System.Runtime.Remoting.Channels.RemoteConnection.CreateNewSocket(EndPoint ipEndPoint)
   at System.Runtime.Remoting.Channels.RemoteConnection.CreateNewSocket()
   at System.Runtime.Remoting.Channels.SocketCache.GetSocket(String machinePortAndSid, Boolean openNew)
   at System.Runtime.Remoting.Channels.Tcp.TcpClientTransportSink.SendRequestWithRetry(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream)
   at System.Runtime.Remoting.Channels.Tcp.TcpClientTransportSink.ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream, ITransportHeaders& responseHeaders, Stream& responseStream)
   at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.SyncProcessMessage(IMessage msg)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at Idera.SQLcompliance.Core.Event.RemoteAuditManager.UpdateDBIds(Hashtable auditedServerDbIds, String instance)
   at Idera.SQLcompliance.Core.Agent.SQLcomplianceAgent.UpdateDBIds(Hashtable auditedServerDbIds, String instance)
   at Idera.SQLcompliance.Core.Agent.SQLInstance.SyncDBIds()