c# - 長期的に安定するように、WCF サービスを作成/使用する方法は?

Question

介入なしで数日または数週間実行できる WCF クライアント サーバー アプリケーションを作成しようとしています。

クライアントがサーバーとのやり取りを処理する方法は次のとおりです。

    static object myLock=new object();
    static MyService.IMyService myService;

    static void PerformServerInteraction(ref MyService.IMyService myService,  Action<MyService.IMyService> action)
    {
        for (int i = 0; i < 10; i++)
        {
            lock (myLock)
            {
                try
                {
                    action(myService);
                    break;
                }
                catch (Exception e)
                {
                    LogException(e);
                }
                myService = new MyServiceClient(); 
            }
            Thread.Sleep(5000);

        }
    }

PerformServerInteractionクライアント アプリによって複数のスレッドから呼び出されます。

ほとんどの場合、サーバーは正常に動作しているようです (ログにエラーは表示されません)。

クライアントから呼び出されたときのサーバー操作には、数ミリ秒のトップがかかります。

数時間、アプリは問題なく動作します。しかしその後、クライアントの呼び出しは大量にタイムアウトを開始します。

System.TimeoutException: The open operation did not complete within the allotted timeout of 00:01:00. The time allotted to this operation may have been a portion of a longer timeout. ---> System.TimeoutException: The socket transfer timed out after 00:01:00. You have exceeded the timeou
t set on your binding. The time allotted to this operation may have been a portion of a longer timeout. ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected
 host has failed to respond
   at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
   --- End of inner exception stack trace ---
   at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
   at System.ServiceModel.Channels.SocketConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
   at System.ServiceModel.Channels.DelegatingConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.SendPreamble(IConnection connection, ArraySegment`1 preamble, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.DuplexConnectionPoolHelper.AcceptPooledConnection(IConnection connection, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
   --- End of inner exception stack trace ---

Server stack trace:
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at .....my code

クライアント アプリケーションまたはサーバー アプリケーションを再起動するまで、問題は解決しません。複数のクライアント アプリケーションを実行すると、クライアントの 1 つでこの種の問題が他のクライアントに干渉します。

サーバーの起動コードは次のとおりです。

try
{
    ThreadPool.SetMaxThreads(int.MaxValue, int.MaxValue);
    //lets make sure that BW2 does not disturb the other software on the computer
    Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.BelowNormal;

    //load the shedluer static constructor
    ServiceHost svh = new ServiceHost(typeof(MyService));

    var tcpbinding = new NetTcpBinding(SecurityMode.None);

    //remove limits on the max array size
    tcpbinding.MaxBufferPoolSize = 2147483647;
    tcpbinding.MaxBufferSize = 2147483647;

    tcpbinding.MaxReceivedMessageSize = 2147483647;
    tcpbinding.ReaderQuotas.MaxArrayLength = 2147483647;
    tcpbinding.ReaderQuotas.MaxBytesPerRead = 2147483647;
    tcpbinding.ReaderQuotas.MaxStringContentLength = 2147483647;
    tcpbinding.ReaderQuotas.MaxDepth = 2147483647;

    if (IsWindowsServer())
    {
        tcpbinding.MaxConnections = int.MaxValue;
    }

    var location = "net.tcp://localhost:12345";
    svh.AddServiceEndpoint(typeof(IMyService), tcpbinding, location);


    // Check to see if the service host already has a ServiceMetadataBehavior
    if (!IsWindowsServer())
    {
        ServiceMetadataBehavior smb = svh.Description.Behaviors.Find<ServiceMetadataBehavior>();
        // If not, add one
        if (smb == null)
            smb = new ServiceMetadataBehavior();
        //smb.HttpGetEnabled = true;
        smb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15;
        svh.Description.Behaviors.Add(smb);

        // Add MEX endpoint

        svh.AddServiceEndpoint(
            ServiceMetadataBehavior.MexContractName,
            MetadataExchangeBindings.CreateMexTcpBinding(),
            location + "/mex"
            );
    }

    svh.Open();
    Console.WriteLine("Service maunted at {0}", location);
    Console.WriteLine("Press any key to exit");
    Console.ReadKey();
    svh.Close();
    Console.WriteLine("Done");
}
catch (Exception e)
{
    Console.WriteLine("Exception");
    Console.WriteLine(e);
}

なぜこれが発生するのですか?また、今後これを回避するにはどうすればよいですか?