Error 400 from mex endpoint

Question

Hi.

I've got a error, when trying to add service reference, or look at service from WCFClient

Error HTTP 400: Bad Request.
Metadata contain unresoved reference: "http://localhost:8731/Design_Time_Addresses/MyService/mex".
XML document (1, 367748) contains a error.
"type" attribute value is invalid —
"q1:ArrayOfKeyValueOfstringArrayOfanyTypety7Ep6D1" is invalid value for attribute "type"..


Removing any operation from service interface resolves problem.

I guess, the error is produced by small size of buffers, but I don't know how to increase its' size.

Answer 1

<bindings>
    <basicHttpBinding>
        <binding  name="basic_HttpBinding"  transferMode="Buffered"
         closeTimeout="00:10:00" openTimeout="00:10:00" receiveTimeout="00:10:00" sendTimeout="0:10:00"         
         maxReceivedMessageSize="2147483647" maxBufferSize="2147483647">
            <security mode="None">
            </security>
            <readerQuotas   maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
        </binding>
    </basicHttpBinding>
</bindings>

check u configuration and replace the binding section with the above bindings

Answer 2

Hi ,

It is an best option to turn on WCF message trace to investigate this kind of questions. Please have a look at MSDN help about message tracing.
http://msdn.microsoft.com/en-us/library/ms733025.aspx

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Best regards,
Riquel
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