[LOG4NET-581] NullReferenceException from log4net.Util.ReadOnlyPropertiesDictionary.GetObjectData

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.8
• Fix Version/s: 2.1.0
• Component/s: Other
• Labels: patch
• Environment: Windows Server 2012R
• Flags: Patch, Important
• Assignee: Dominik Psenner
• Reporter: Vlad Lee
• Created: 08/Nov/17 18:59
• Updated: 24/Feb/20 22:15
• Resolved: 09/Nov/17 17:26

Description

Hello,

Below is the full exception stack. Exception happens because entryValue is null, so attempt to get IsSerializable attribute from GetType() was failing.

Updated file is attached, this works for us now. Let me know if you have questions.

Thank you,
Vlad

System.NullReferenceException: Object reference not set to an instance of an object.

Server stack trace:
at System.Object.GetType()
at log4net.Util.ReadOnlyPropertiesDictionary.GetObjectData(SerializationInfo info, StreamingContext context)
at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder)
at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Write(WriteObjectInfo objectInfo, NameInfo memberNameInfo, NameInfo typeNameInfo)
at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck)
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck)
at System.Runtime.Remoting.Channels.BinaryServerFormatterSink.SerializeResponse(IServerResponseChannelSinkStack sinkStack, IMessage msg, ITransportHeaders& headers, Stream& stream)
at System.Runtime.Remoting.Channels.BinaryServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream)

Issue Links

• is duplicated by: LOG4NET-591 Serializing LoggingEvent with null entries in Properties throws exception
• is duplicated by: LOG4NET-614 If LogicalThreadContext has a property with NULL value it causes an exception