Error in WCF custom behaviour

Question

Hi All,
Its been quite some time i am struggling with this issue.
we have a wcf custom behavior which validates the schema. on top of that i have implemented logic to remove any attachment node (in received xml file we have a record called attachments which intern contains element which holds attachment data) if size is
greater than 2.5MB then re construct the element with value saying "your attachment has been removed".
code every thing is working fine with single message but when do a load test (with thread = 5 and number of test =10 in SOAP UI ) then getting a below warnings. (with single thread is working fine)
The adapter "WCF-CustomIsolated" raised an error message. Details "System.Xml.XmlException: The input source is not correctly formatted. at System.Xml.XmlExceptionHelper.ThrowXmlException(XmlDictionaryReader reader, String res, String
arg1, String arg2, String arg3) at System.Xml.XmlBufferReader.ReadValue(XmlBinaryNodeType nodeType, ValueHandle value)
The adapter "WCF-CustomIsolated" raised an error message. Details "System.Xml.XmlException: The prefix 'k' is not defined.at System.Xml.XmlExceptionHelper.ThrowXmlException(XmlDictionaryReader reader, String res, String arg1, String arg2,
String arg3)
below is the code used to read the attachment size 
using (AttachmentReader = message4.GetReaderAtBodyContents().ReadSubtree())
                            while (AttachmentReader.Read())
                                if (AttachmentReader.IsStartElement())
                                    strNs = AttachmentReader.NamespaceURI;// read the namespace of message for schema validation
                                while (AttachmentReader.ReadToFollowing(AtmtNode)) //read attachment node
                                    countAttachment = countAttachment + 1; //count the number of attachments in a message
                                    AtmtSize = AtmtSize + AttachmentReader.ReadElementContentAsString().Length;// check the size of attachment content node
                            AttachmentReader.Close();
//check of the size greater than 2.5MB
IsSizeMax = (AtmtSize > System.Convert.ToInt32(validateAtmtSize)) ? true : false;
//if size is greater than 2.5MB then remove the attachment node and reconstruct the same
if (count == attachmentCount) // Finally write the attachment node with configured message (converted to base64) this will read all the attachment nodes and writes only one record inspite of multiple attachments
                                            if (HasAtbt) // if "attachments" record has any attributes then create attachments record with
along attributes
                                                wr.WriteStartElement(AtmtRecord, Ns);//This will create "attachments" record with
attribute
                                                wr.WriteElementString(AtmtName, "RemovedAttachment.txt");//"attachment_content_name"
                                                wr.WriteElementString(AtmtType, "text/plain");//"attachment_content_type"
                                                wr.WriteElementString(AtmtNode, Msg);//attachme content node
                                                wr.WriteEndElement();wr.Flush();
                        wr.Close();
                        bodyReader.Close();
                        strMsg = SB.ToString();
                        int fIdx = strMsg.IndexOf("</" + RefId + ">");
                        int lastIdx = strMsg.IndexOf("<" + RefId);
parashuram

Answer 1

Hi，
Please refer to the Q and A
http://code.msdn.microsoft.com/windowsapps/How-to-integrate-BizTalk-07fada58/view/Discussions