System.ObjectDisposedException: Safe handle has been closed

Question

Hi All,
I have been struggling on a similar issue as “https://social.msdn.microsoft.com/Forums/sqlserver/en-US/2e98ec85-9ce0-452c-89c4-3cb6c4167590/systemobjectdisposedexception-safe-handle-has-been-closed-while-trying-to-begin-a-transaction?forum=sqldatabaseengine”
in a web application based on .net framework 2.0 and sql server 2008 R2. the exception happened about 3 times per month since 2011, and when it happens, no one could connect to the web site anymore. Here is the stack trace of the error.
at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean& success)     
at SNINativeMethodWrapper.SNIPacketReset(SafeHandle pConn, IOType ioType, SafeHandle packet)
at System.Data.SqlClient.TdsParserStateObject.WriteSni()     
at System.Data.SqlClient.TdsParserStateObject.ExecuteFlush()     
at System.Data.SqlClient.TdsParser.TdsExecuteRPC(_SqlRPC[] rpcArray, Int32 timeout, Boolean
inSchema, SqlNotificationRequest notificationRequest, TdsParserStateObject stateObj, Boolean isCommandProc)     
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior
runBehavior, Boolean returnStream, Boolean async)     
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior
runBehavior, Boolean returnStream, String method, DbAsyncResult result)     
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior
runBehavior, Boolean returnStream, String method)     
at System.Data.SqlClient.SqlCommand.ExecuteScalar()     
at System.Data.SqlClient.SqlCommand.ExecuteScalar()     
at TNSSmartNetwork.SPS.Data.SystemEventLog.EventLogEntry.Add(GenericPrincipal CurrentPrincipal)
at TNSSmartNetwork.SPS.Web.Shell.Global.Session_Start(Object sender, EventArgs e)     
at System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e)     
at System.Web.SessionState.SessionStateModule.CompleteAcquireState()     
at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e,
AsyncCallback cb, Object extraData)     
at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
I noticed the bug filed on the Microsoft Connect had been fixed, but it does not mention the reason and which version of .net framework it is fixed.
https://connect.microsoft.com/VisualStudio/feedback/details/779588/safe-handle-objectdisposedexception-sqltransaction-dispose
Appreciated if you could provide more details.
julian wu

Answer 1

Hi julian,
As the
connect item indicates, the issue is due to .Net Framework. For quick and accurate answer, I would like to recommend you post the question in the .NET Framework 
forum at
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?category=netdevelopment . It is appropriate and you can get better help.
Thanks,
Lydia Zhang
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Lydia Zhang
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