Bug 38167 - Method 'TcpListener.Create' not found
Summary: Method 'TcpListener.Create' not found
Alias: None
Product: Class Libraries
Classification: Mono
Component: System ()
Version: 4.0.0
Hardware: PC All
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2016-01-29 08:32 UTC by Emil Dinchev
Modified: 2016-01-29 09:28 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

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Description Emil Dinchev 2016-01-29 08:32:13 UTC
In my code I'm using the following statement:
TcpListener tcpListener = new TcpListener(IPAddress.Any, port);

This code is called from different threads and sometimes I receive MissingMethodException with the message "Method 'TcpListener.Create' not found". First of all, I'm not using TcpListener.Create. Second: some calls do not throw this exception. I have the impression that something is not good synchronized in your libraries. Now I will try to synchronize all calls to TcpListener constructor. Please tell me, if you can find the reason for this strange behavoiur.
Comment 1 Emil Dinchev 2016-01-29 09:28:54 UTC
I noticed that the reason for this was the JIT compiler. Actually my code was:
TcpListener tcpListener;
if (Environment.OSSystem.PlatformID == UNIX){
  // Dual sockets are still not supported by MONO.
  tcpListener = new TcpListener(IPAddress.Any, port);
  // From .NET 4.5 this factory method can be used.
  tcpListener = TcpListener.Create(port);

The code was compiled targeting .NET 4.5 and therefore I did'n notice the problem. The solution was to put the 2 branches above in 2 separate methods attributed with [MethodImpl(MethodImplOptions.NoInlining)]