WCF Exists and partially working but for some calls returns “no endpoint listening - (404) Not Found.”

Question

We have service that\'s working with small to large sets of data (document generation), and it\'s working fine for some calls, but for some specific requests (exact same method,

Answer 1

I found in addition to maxAllowedContentLength, the maxRequestLength on the server side in your WCF confgiration needs to be increased as well. I found that both values had to be increased for the exception to be resolved. In the .config for the WCF service server side make sure to add the following:

<system.web>
  <!--Increase 'maxRequestLength' to needed value: 100mb (value is in kilobytes)-->
  <httpRuntime maxRequestLength="102400"/>
</system.web>

Answer 2

I found what was wrong using instructions on Troubleshooting Failed Requests Using Tracing in IIS 7 (very cool stuff btw)

There, I saw that the error was in fact the 404.13, which easily led me to what's really wrong: Content length too large.

In the end, the solution was to add this to web config:

<configuration>
...
  <system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="204800000" />
      </requestFiltering>
    </security>
  </system.webServer>  
</configuration>

and, also, make sure that the default web site doesn't override it using:

"%WINDIR%\System32\inetsrv\appcmd.exe" list config "Default web site" -section:requestFiltering

Answer 3

If you are suspicious about the content and/or length of the message, you can try to intercept the calls using something like Fiddler - that should set your mind at ease on those points.

Answer 4

Check the name attribute of the service element in the web.config:

<configuration>
    <system.serviceModel>
        <services>
            <service name="...">

The service name should contain the correct namespace+classname. You can find this in de code or by looking in the markup of the .svc file (or open the .svc file with notepad) for the Service="..." attribute.