XenDesktop 5.6在配置Host的时候，一直出现位置错误，导致无法连接到vsphere。

错误信息： Desktop Studio has detected an unexpected error.

Exception:    System.Reflection.TargetInvocationException Exception has been thrown by the target of an invocation.       at Citrix.Console.Common.CallbackEventArguments.OperationCompleteSynchronizer`1.GetResults()       at Citrix.Console.Common.CallbackEventArguments.OperationCompleteSynchronizer`1.WaitForResults()       at Citrix.Console.Hypervisors.UI.Pages.HypervisorDetailsPageViewModel.ValidatePage()Inner exception:    Citrix.Console.Models.CallbackEventArguments.ScriptException Desktop Studio has detected an unexpected error.       at Citrix.Console.PowerShellInteraction.XDCommand.EndExecutionAndCheckErrors(ProgressModel progressModel)       at Citrix.Console.PowerShellInteraction.XDCommand.EndExecutionAndCheckErrors()       at Citrix.Console.PowerShellSdk.HypervisorService.Scripts.CreateHypervisorConnection.
     
      d__7.MoveNext()       at Citrix.Console.PowerShellInteraction.PowerShellScript`1.
      
       d__9.MoveNext()       at Citrix.Console.InteractionCore.ScriptBase.
       
        d__1.MoveNext()       at Citrix.Console.InteractionCore.Scheduler.ExecuteNext(ScriptExecution execution)    Error data:        ExceptionThrown\nSystem.InvalidOperationException: An exception occurred.  The associated message was Exception of type 'System.OutOfMemoryException' was thrown.        Exception : Citrix.ManagedMachineAPI.ManagedMachineException: Exception of type 'System.OutOfMemoryException' was thrown. ---> System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.           at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderVimService.Read1_Object(Boolean isNullable, Boolean checkType)           at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderVimService.Read1546_PropertyChange(Boolean isNullable, Boolean checkType)           at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderVimService.Read1548_ObjectUpdate(Boolean isNullable, Boolean checkType)           at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderVimService.Read1550_PropertyFilterUpdate(Boolean isNullable, Boolean checkType)           at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderVimService.Read1551_UpdateSet(Boolean isNullable, Boolean checkType)           at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderVimService.Read3172_WaitForUpdatesResponse()           at Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer1797.Deserialize(XmlSerializationReader reader)           at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)           at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle)           at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)           at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)           at VimApi.VimService.WaitForUpdates(ManagedObjectReference _this, String version)           at Citrix.PoolManagement.VMManager.VmmImplementation.Vmware.InventoryCache.InitialiseFiltersAndRetrieveLatestUpdateVersion(VmwareSession session)           at Citrix.PoolManagement.VMManager.VmmImplementation.Vmware.InventoryCache.LoadVMsAndHosts(VmwareSession session)           at Citrix.PoolManagement.VMManager.VmmImplementation.Vmware.VmwareVmConnection.SingleConnectionAttempt()           at HypervisorsCommon.BaseConnector`2.AttemptConnection(Boolean throwExceptions)           at HypervisorsCommon.BaseConnector`2.Start()           at Citrix.PoolManagement.VMManager.VmmImplementation.Vmware.VmwareVmManager..ctor(String vmmServer, String userName, SecureString password, VMwareConfig config)           --- End of inner exception stack trace ---           at Citrix.HostingUnitService.SDK.SDKLogic.HandleException(Exception ex)           at Citrix.HostingUnitService.SDK.SDKLogic.EstablishHypervisorConnection(HypervisorConnectionInternal connection, IHypervisor& hypervisor, IHypConnection& hclConnection)           at Citrix.HostingUnitService.SDK.SDKLogic.ValidateConnectionDetails(HypervisorConnectionInternal connection)           at Citrix.HostingUnitService.SDK.SDKLogic.NewHypervisorConnection(String name, String userName, SecretStringBuffer password, ConnectionType connectionType, String[] addresses, String pluginId, Boolean commit, HypervisorConnection& connection)           at Citrix.HostingUnitService.SDK.SdkHostingUnitService.<>c__DisplayClass25.
        
         b__24()           at Citrix.XDServiceBase.ServiceBase.CheckedCall[T](String name, Func`1 operation, Func`2 defaultValue, Enum code)        Reason : ManagedMachineException        Message : Exception of type 'System.OutOfMemoryException' was thrown.
        
       
      
     

Message : Exception of type 'System.OutOfMemoryException' was thrown.

仔细查看错误信息我们发现提示内存不足，具体原因不是很确定，也无法做进一步的确认。关机，增加DDC内存，重新配置，解决了该问题。

BTW：

有可能和虚拟内存的配置有关系，该VM经过简单的优化，内存为1.5G，禁用了虚拟内存（分页文件）。

出现问题的时候，增加内存到2G解决问题。可能启用虚拟内存也能解决问题，但是考虑到虚拟机磁盘的压力相对内存来说要大很多，还是选择了增加内存容量。