[Mono-bugs] [Bug 491974] New: DNS lookups from xsp2 hosted code fails (System.Net.Dns.GetHostEntry, etc)

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Fri Apr 3 13:26:35 EDT 2009


           Summary: DNS lookups from xsp2 hosted code fails
                    (System.Net.Dns.GetHostEntry, etc)
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.4.x
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: System
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: peter at peterjohanson.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

User-Agent:       Mozilla/5.0 (X11; U; Linux x86_64; en; rv:
Gecko/20080528 Epiphany/2.22 Firefox/3.0

I hit this when trying to use a web-service from a new ASP.NET MVC project. The
calls to the webservice were throwing WebExceptions about NameResolutionFailed.

Digging further, just trying to do System.Net.Dns.GetHostEntry fails from
inside the web app. I will attach the simplest demo MVC app that produces the
error. If you would like a more barebones test case, I will try to produce one.

The exception is:

System.TypeInitializationException: An exception was thrown by the type
initializer for System.Net.Sockets.Socket ---> System.InvalidCastException:
Cannot cast from source type to destination type.
  at System.Net.Sockets.Socket.CheckProtocolSupport () [0x0003c] in
  at System.Net.Sockets.Socket..cctor () [0x0000c] in
  --- End of inner exception stack trace ---
  at (wrapper managed-to-native) System.Net.Dns:GetHostByName_internal
  at System.Net.Dns.GetHostByName (System.String hostName) [0x00011] in
  at System.Net.Dns.GetHostEntry (System.String hostNameOrAddress) [0x00061] in
  at System.Net.Dns.GetHostAddresses (System.String hostNameOrAddress)
[0x00065] in
  at System.Web.HttpRequest.GetLocalHostAddresses () [0x00006] in

If I try to load the configuration section trying to be loaded on
Socket.cs:1342, it seems to load a SettingsSection just fine.

Reproducible: Always

Steps to Reproduce:
1. Host soemthing in xsp2
2. Try to resolve a valid hostname (e.g via Dns.GetHostEntry)
Actual Results:  

Expected Results:  
Hostname resolves.

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