[Mono-dev] WCF throwing System.NullReferenceException on multithreaded application

[tadaP]

I am consistently having a System.NullReferenceException on making a WCF
call.The application is a multi-threaded app and each thread makes a WCF
call at acertain interval. I see the app throwing exception everytime I
start the appand at the same thread.I am using Mono 3.0.5.The stack trace
looks as below[ERROR] FATAL UNHANDLED EXCEPTION:
System.NullReferenceException: Objectreference not set to an instance of an
object  at System.Array.Copy (System.Array sourceArray, Int32
sourceIndex,System.Array destinationArray, Int32 destinationIndex, Int32
length)
[0x00104]in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/corlib/System/Array.cs:975  
at System.Collections.ArrayList.CopyTo (Int32 index, System.Array
array,Int32 arrayIndex, Int32 count) [0x0002d]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/corlib/System.Collections/ArrayList.cs:3064  
at System.Collections.ArrayList.CopyTo (System.Array array, Int32
arrayIndex)[0x00000]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/corlib/System.Collections/ArrayList.cs:3046  
at System.MonoCustomAttrs.GetCustomAttributes (ICustomAttributeProvider
obj,System.Type attributeType, Boolean inherit) [0x0028f]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/corlib/System/MonoCustomAttrs.cs:252  
at System.MonoType.GetCustomAttributes (System.Type attributeType,
Booleaninherit) [0x00017]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/corlib/System/MonoType.cs:582  
atSystem.Runtime.Serialization.KnownTypeCollection.GetAttribute[CollectionDataContractAttribute](ICustomAttributeProvider
ap) [0x00000]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/KnownTypeCollection.cs:779  
atSystem.Runtime.Serialization.KnownTypeCollection.RegisterCollectionContract(System.Type
type) [0x00000]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/KnownTypeCollection.cs:785  
at
System.Runtime.Serialization.KnownTypeCollection.DoTryRegister(System.Type
type) [0x00038]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/KnownTypeCollection.cs:742  
at System.Runtime.Serialization.KnownTypeCollection.TryRegister
(System.Typetype) [0x0000c]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/KnownTypeCollection.cs:723  
at System.Runtime.Serialization.KnownTypeCollection.InsertItem (Int32
index,System.Type type) [0x00019]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/KnownTypeCollection.cs:466  
at System.Collections.ObjectModel.Collection`1[System.Type].Add
(System.Typeitem) [0x0000c]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/corlib/System.Collections.ObjectModel/Collection.cs:74  
at
System.Runtime.Serialization.DataContractSerializer.RegisterTypeAsKnown(System.Type
type) [0x00026]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/DataContractSerializer.cs:238  
at
System.Runtime.Serialization.DataContractSerializer.PopulateTypes(IEnumerable`1
knownTypes) [0x00058]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/DataContractSerializer.cs:226  
at System.Runtime.Serialization.DataContractSerializer..ctor
(System.Typetype, System.String rootName, System.String rootNamespace,
IEnumerable`1knownTypes) [0x00051]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.Runtime.Serialization/System.Runtime.Serialization/DataContractSerializer.cs:107  
at
System.ServiceModel.Dispatcher.DataContractMessagesFormatter.GetSerializer(System.ServiceModel.Description.MessagePartDescription
partDesc) [0x00055]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Dispatcher/BaseMessagesFormatter.cs:448  
atSystem.ServiceModel.Dispatcher.DataContractMessagesFormatter+DataContractBodyWriter.WriteMessagePart(System.Xml.XmlDictionaryWriter
writer,System.ServiceModel.Description.MessageBodyDescription
desc,System.ServiceModel.Description.MessagePartDescription partDesc,
System.Objectobj) [0x00049]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Dispatcher/BaseMessagesFormatter.cs:501  
atSystem.ServiceModel.Dispatcher.DataContractMessagesFormatter+DataContractBodyWriter.OnWriteBodyContents(System.Xml.XmlDictionaryWriter
writer) [0x00091]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Dispatcher/BaseMessagesFormatter.cs:486  
at
System.ServiceModel.Channels.BodyWriter.WriteBodyContents(System.Xml.XmlDictionaryWriter
writer) [0x00000]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/BodyWriter.cs:57  
at
System.ServiceModel.Channels.SimpleMessage.OnWriteBodyContents(System.Xml.XmlDictionaryWriter
writer) [0x00000]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/MessageImpl.cs:331  
at
System.ServiceModel.Channels.Message.WriteBodyContents(System.Xml.XmlDictionaryWriter
writer) [0x00022]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/Message.cs:164  
at
System.ServiceModel.Channels.Message.WriteBody(System.Xml.XmlDictionaryWriter
writer) [0x0001c]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/Message.cs:149  
at
System.ServiceModel.Channels.Message.OnWriteMessage(System.Xml.XmlDictionaryWriter
writer) [0x00065]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/Message.cs:274  
at
System.ServiceModel.Channels.Message.WriteMessage(System.Xml.XmlDictionaryWriter
writer) [0x00026]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/Message.cs:176  
at
System.ServiceModel.Channels.TextMessageEncoder.WriteMessage(System.ServiceModel.Channels.Message
message, System.IO.Stream stream)[0x00043]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/TextMessageEncoder.cs:117  
at
System.ServiceModel.Channels.HttpRequestChannel.BeginProcessRequest(System.ServiceModel.Channels.HttpChannelRequestAsyncResult
result)
[0x003a8]in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/HttpRequestChannel.cs:173  
at
System.ServiceModel.Channels.HttpRequestChannel.BeginRequest(System.ServiceModel.Channels.Message
message, TimeSpan timeout,System.AsyncCallback callback, System.Object
state) [0x00012]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/HttpRequestChannel.cs:315  
at
System.ServiceModel.Channels.HttpRequestChannel.Request(System.ServiceModel.Channels.Message
message, TimeSpan timeout) [0x00000]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel.Channels/HttpRequestChannel.cs:72  
at
System.ServiceModel.MonoInternal.ClientRuntimeChannel.Request(System.ServiceModel.Channels.Message
msg, TimeSpan timeout) [0x0000b]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:582  
at
System.ServiceModel.MonoInternal.ClientRuntimeChannel.Request(System.ServiceModel.Description.OperationDescription
od, System.Object[]parameters) [0x00066]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:537  
at
System.ServiceModel.MonoInternal.ClientRuntimeChannel.DoProcess(System.Reflection.MethodBase
method, System.String operationName,System.Object[] parameters) [0x00038]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:502  
at
System.ServiceModel.MonoInternal.ClientRuntimeChannel.Process(System.Reflection.MethodBase
method, System.String operationName,System.Object[] parameters) [0x0001c]
in/private/tmp/monobuild/build/BUILD/mono-2.10.9/mcs/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:479Is
there is any fix for the issue?



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