[jira] [Created] (LOG4NET-363) System.ObjectDisposedException thrown in log4net.Layout.XmlLayoutSchemaLog4j.FormatXml ln 47

["David Perlman (JIRA)" <ji...@apache.org>]

David Perlman created LOG4NET-363:
-------------------------------------

             Summary: System.ObjectDisposedException thrown in log4net.Layout.XmlLayoutSchemaLog4j.FormatXml ln 47
                 Key: LOG4NET-363
                 URL: https://issues.apache.org/jira/browse/LOG4NET-363
             Project: Log4net
          Issue Type: Bug
          Components: Appenders
    Affects Versions: 1.2.11
         Environment: IIS 7.0
            Reporter: David Perlman
            Priority: Minor


On line 47 in XmlLayoutSchemaLog4j there is a reference to the LoggingEvent.Identity property. If this call is made after the web request is finished (from a different thread) the logger throws (below the exception is my sad workaround):

log4net:ERROR [UdpAppender] ErrorCode: WriteFailure. Unable to send logging event to remote host ------- on port ----.
System.ObjectDisposedException: Safe handle has been closed
   at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean& success)
   at Microsoft.Win32.Win32Native.GetTokenInformation(SafeTokenHandle TokenHandle, UInt32 TokenInformationClass, SafeLocalAllocHandle TokenInformation, UInt32 TokenInformationLength, UInt32& ReturnLength)
   at System.Security.Principal.WindowsIdentity.GetTokenInformation(SafeTokenHandle tokenHandle, TokenInformationClass tokenInformationClass)
   at System.Security.Principal.WindowsIdentity.get_User()
   at System.Security.Principal.WindowsIdentity.GetName()
   at System.Security.Principal.WindowsIdentity.get_Name()
   at log4net.Core.LoggingEvent.get_Identity()
   at log4net.Layout.XmlLayoutSchemaLog4j.FormatXml(XmlWriter writer, LoggingEvent loggingEvent)
   at log4net.Layout.XmlLayoutBase.Format(TextWriter writer, LoggingEvent loggingEvent)
   at log4net.Appender.AppenderSkeleton.RenderLoggingEvent(LoggingEvent loggingEvent)
   at log4net.Appender.UdpAppender.Append(LoggingEvent loggingEvent)


Workaround -----

// translate identity name
            // When logging on a thread that continues (asynchronously) after the web request is finished this will throw the logging
            try
            {
                if (loggingEvent.Identity != null &&
                    loggingEvent.Identity.Length > 0 &&
                    loggingEvent.LookupProperty(LoggingEvent.IdentityProperty) == null)
                {
                    loggingEvent.GetProperties()[LoggingEvent.IdentityProperty] = loggingEvent.Identity ?? "identity lost";
                }
            }
            catch { }            

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