fix scheduled task crash

MediaBrowser.Common.Implementations/ScheduledTasks/TaskManager.cs

@@ -106,9 +106,16 @@ namespace MediaBrowser.Common.Implementations.ScheduledTasks
         public void QueueScheduledTask<T>(TaskExecutionOptions options)
             where T : IScheduledTask
         {
-            var scheduledTask = ScheduledTasks.First(t => t.ScheduledTask.GetType() == typeof(T));
+            var scheduledTask = ScheduledTasks.FirstOrDefault(t => t.ScheduledTask.GetType() == typeof(T));
 
-            QueueScheduledTask(scheduledTask, options);
+            if (scheduledTask == null)
+            {
+                Logger.Error("Unable to find scheduled task of type {0} in QueueScheduledTask.", typeof(T).Name);
+            }
+            else
+            {
+                QueueScheduledTask(scheduledTask, options);
+            }
         }
 
         public void QueueScheduledTask<T>()
@@ -124,9 +131,16 @@ namespace MediaBrowser.Common.Implementations.ScheduledTasks
         /// <param name="options">The task options.</param>
         public void QueueScheduledTask(IScheduledTask task, TaskExecutionOptions options)
         {
-            var scheduledTask = ScheduledTasks.First(t => t.ScheduledTask.GetType() == task.GetType());
+            var scheduledTask = ScheduledTasks.FirstOrDefault(t => t.ScheduledTask.GetType() == task.GetType());
 
-            QueueScheduledTask(scheduledTask, options);
+            if (scheduledTask == null)
+            {
+                Logger.Error("Unable to find scheduled task of type {0} in QueueScheduledTask.", task.GetType().Name);
+            }
+            else
+            {
+                QueueScheduledTask(scheduledTask, options);
+            }
         }
 
         /// <summary>

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -500,6 +500,10 @@ namespace MediaBrowser.Controller.Entities
 
                 return null;
             }
+            set
+            {
+                
+            }
         }
 
         public void SetParent(Folder parent)

MediaBrowser.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs

@@ -618,6 +618,11 @@ namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
                 _logger.ErrorException("Error recording", ex);
                 recording.Status = RecordingStatus.Error;
             }
+            finally
+            {
+                CancellationTokenSource removed;
+                _activeRecordings.TryRemove(timer.Id, out removed);
+            }
 
             recording.DateLastUpdated = DateTime.UtcNow;
             _recordingProvider.Update(recording);
@@ -627,15 +632,17 @@ namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
                 OnSuccessfulRecording(recording);
                 _timerProvider.Delete(timer);
             }
-            else
+            else if (DateTime.UtcNow < timer.EndDate)
             {
-                if (DateTime.UtcNow < timer.EndDate)
-                {
-                    const int retryIntervalSeconds = 60;
-                    _logger.Info("Retrying recording in {0} seconds.", retryIntervalSeconds);
+                const int retryIntervalSeconds = 60;
+                _logger.Info("Retrying recording in {0} seconds.", retryIntervalSeconds);
 
-                    _timerProvider.StartTimer(timer, TimeSpan.FromSeconds(retryIntervalSeconds));
-                }
+                _timerProvider.StartTimer(timer, TimeSpan.FromSeconds(retryIntervalSeconds));
+            }
+            else
+            {
+                _timerProvider.Delete(timer);
+                _recordingProvider.Delete(recording);
             }
         }