added NoOpPerformanceCounterManager for signalr so linux doesn't blowup.

NzbDrone.Api/NzbDrone.Api.csproj

@@ -147,6 +147,7 @@
     <Compile Include="Extensions\ReqResExtensions.cs" />
     <Compile Include="Config\SettingsModule.cs" />
     <Compile Include="SignalR\BasicResourceConnection.cs" />
+    <Compile Include="SignalR\NoOpPerformanceCounterManager.cs" />
     <Compile Include="SignalR\Serializer.cs" />
     <Compile Include="SignalR\SignalrDependencyResolver.cs" />
     <Compile Include="SignalR\NzbDronePersistentConnection.cs" />

NzbDrone.Api/SignalR/NoOpPerformanceCounterManager.cs

@@ -0,0 +1,105 @@
+using System.Diagnostics;
+using System.Threading;
+using Microsoft.AspNet.SignalR.Infrastructure;
+
+namespace NzbDrone.Api.SignalR
+{
+    public class NoOpPerformanceCounterManager : IPerformanceCounterManager
+    {
+        private static readonly IPerformanceCounter noOpCounter = new NoOpPerformanceCounter();
+
+        public void Initialize(string instanceName, CancellationToken hostShutdownToken)
+        {
+
+        }
+
+        public IPerformanceCounter LoadCounter(string categoryName, string counterName, string instanceName, bool isReadOnly)
+        {
+            return noOpCounter;
+        }
+
+        public IPerformanceCounter ConnectionsConnected { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionsReconnected { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionsDisconnected { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionsCurrent { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionMessagesReceivedTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionMessagesSentTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionMessagesReceivedPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ConnectionMessagesSentPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusMessagesReceivedTotal { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusMessagesReceivedPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutMessageBusMessagesReceivedPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusMessagesPublishedTotal { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusMessagesPublishedPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusSubscribersCurrent { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusSubscribersTotal { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusSubscribersPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusAllocatedWorkers { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusBusyWorkers { get { return noOpCounter; } }
+        public IPerformanceCounter MessageBusTopicsCurrent { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsAllTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsAllPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsHubResolutionTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsHubResolutionPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsHubInvocationTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsHubInvocationPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsTransportTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ErrorsTransportPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutStreamCountTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutStreamCountOpen { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutStreamCountBuffering { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutErrorsTotal { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutErrorsPerSec { get { return noOpCounter; } }
+        public IPerformanceCounter ScaleoutSendQueueLength { get { return noOpCounter; } }
+    }
+
+    public class NoOpPerformanceCounter : IPerformanceCounter
+    {
+        public string CounterName
+        {
+            get
+            {
+                return this.GetType().Name;
+            }
+        }
+
+        public long RawValue
+        {
+            get
+            {
+                return 0L;
+            }
+            set
+            {
+            }
+        }
+
+        public long Decrement()
+        {
+            return 0L;
+        }
+
+        public long Increment()
+        {
+            return 0L;
+        }
+
+        public long IncrementBy(long value)
+        {
+            return 0L;
+        }
+
+        public void Close()
+        {
+        }
+
+        public void RemoveInstance()
+        {
+        }
+
+        public CounterSample NextSample()
+        {
+            return CounterSample.Empty;
+        }
+    }
+}

NzbDrone.Api/SignalR/SignalrDependencyResolver.cs

@@ -1,5 +1,6 @@
 using System;
 using Microsoft.AspNet.SignalR;
+using Microsoft.AspNet.SignalR.Infrastructure;
 using NzbDrone.Common.Composition;
 
 namespace NzbDrone.Api.SignalR
@@ -15,6 +16,7 @@ namespace NzbDrone.Api.SignalR
 
         private SignalrDependencyResolver(IContainer container)
         {
+            container.RegisterSingleton(typeof(IPerformanceCounterManager), typeof(NoOpPerformanceCounterManager));
             _container = container;
         }
 

NzbDrone.Test.Dummy/app.config

@@ -0,0 +1,3 @@
+<?xml version="1.0"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>