ReportServerStorageException An error occurred within the report server database

System.Web.Services.Protocols.SoapException: System.Web.Services.Protocols.SoapException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. ---> Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. ---> System.Data.SqlClient.SqlException: A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)
   at Microsoft.ReportingServices.WebServer.ReportingService2005Impl.GetPermissions(String Item, String[]& Permissions)
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 Microsoft.SqlServer.ReportingServices2010.ReportingService2010.GetPermissions(String ItemPath)

   at Microsoft.SqlServer.ReportingServices2010.RSConnection2010.<>c__DisplayClass3e.<GetPermissions>b__3d()

   at Microsoft.SqlServer.ReportingServices2010.RSConnection2010.SoapMethodWrapper`1.ExecuteMethod(Boolean setConnectionProtocol)

   at Microsoft.SqlServer.ReportingServices2010.RSConnection2010.SoapMethodWrapper`1.ExecuteMethod()

   at Microsoft.SqlServer.ReportingServices2010.RSConnection2010.GetPermissions(String itemPath)

   at Microsoft.ReportingServices.UI.Permissions.GetPermissions()

   at Microsoft.ReportingServices.UI.Permissions.CurrentUser(String itemPath)

   at Microsoft.ReportingServices.UI.ReportingPage.get_RSUser()

   at Microsoft.ReportingServices.UI.ReportWrapperPage.Page_Init(Object sender, EventArgs e)

   at System.EventHandler.Invoke(Object sender, EventArgs e)

   at System.Web.UI.Control.OnInit(EventArgs e)

   at System.Web.UI.Page.OnInit(EventArgs e)

   at System.Web.UI.Control.InitRecursive(Control namingContainer)

   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
library!ReportServer_0-1!13f8!05/02/2017-11:13:53:: Call to GetSystemPropertiesAction().
library!ReportServer_0-1!13f8!05/02/2017-11:14:12:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: , An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database.;
library!ReportServer_0-1!13f8!05/02/2017-11:14:12:: e ERROR: Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. ---> System.Data.SqlClient.SqlException: A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)
ui!ReportManager_0-2!ac0!05/02/2017-11:14:12:: e ERROR: System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.End()
   at Microsoft.ReportingServices.UI.ReportingPage.ShowErrorPage(String errMsg)
library!WindowsService_0!a18!05/02/2017-11:15:02:: i INFO: Call to CleanBatch()
library!WindowsService_0!a18!05/02/2017-11:15:02:: i INFO: Cleaned 0 batch records, 0 policies, 0 sessions, 0 cache entries, 0 snapshots, 0 chunks, 0 running jobs, 0 persisted streams, 0 segments, 0 segment mappings, 0 edit sessions.
library!WindowsService_0!a18!05/02/2017-11:15:02:: i INFO: Call to CleanBatch() ends