Legacy .Net based VMware agent keep getting Out of Memory error (4258799)

Legacy .Net based VMware agent keep getting Out of Memory error

The following error occur in the collector log:

2014-04-14 08:57:56,279 [16] ERROR Collector - GetFreshInventoryWorker - Error in InventoryService.GetFreshInventoryWorker: System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
   at System.String.GetStringForStringBuilder(String value, Int32 startIndex, Int32 length, Int32 capacity)
   at System.Text.StringBuilder.GetNewString(String currentString, Int32 requiredLength)
   at System.Text.StringBuilder.Append(Char[] value, Int32 startIndex, Int32 charCount)
   at System.IO.StreamReader.ReadToEnd()
   at VimApi40.SOAPLogger.Copy(Stream from, Stream to)
   at VimApi40.SOAPLogger.WriteInput(SoapMessage message)
   at VimApi40.SOAPLogger.ProcessMessage(SoapMessage message)
   at System.Web.Services.Protocols.SoapMessage.RunExtensions(SoapExtension[] extensions, Boolean throwOnException)
   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 VimApi40.VimService.RetrieveProperties(ManagedObjectReference _this, PropertyFilterSpec[] specSet)
   at Vizioncore.Vmware.Vim.VimHierarchy.get_RootFolder()
   at FoglightAgent.Services.Inventory.InventoryService.GetFreshInventoryWorker()