Fixed: Exception thrown when marking download as complete

src/NzbDrone.Core/Download/CompletedDownloadService.cs

@@ -3,8 +3,10 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using NLog;
+using NLog.Fluent;
 using NzbDrone.Common.EnvironmentInfo;
 using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Instrumentation.Extensions;
 using NzbDrone.Core.Download.TrackedDownloads;
 using NzbDrone.Core.History;
 using NzbDrone.Core.MediaFiles;
@@ -159,8 +161,8 @@ namespace NzbDrone.Core.Download
             // Since imports should be relatively fast and these types of data changes are infrequent this should be quite
             // safe, but commenting for future benefit.
 
-            if (importResults.Any(c => c.Result == ImportResultType.Imported))
-            {
+            var atLeastOneEpisodeImported = importResults.Any(c => c.Result == ImportResultType.Imported);
+
             var historyItems = _historyService.FindByDownloadId(trackedDownload.DownloadItem.DownloadId)
                                               .OrderByDescending(h => h.Date)
                                               .ToList();
@@ -168,12 +170,24 @@ namespace NzbDrone.Core.Download
             var allEpisodesImportedInHistory = _trackedDownloadAlreadyImported.IsImported(trackedDownload, historyItems);
 
             if (allEpisodesImportedInHistory)
+            {
+                if (atLeastOneEpisodeImported)
                 {
                     _logger.Debug("All episodes were imported in history for {0}", trackedDownload.DownloadItem.Title);
                     trackedDownload.State = TrackedDownloadState.Imported;
                     _eventAggregator.PublishEvent(new DownloadCompletedEvent(trackedDownload, trackedDownload.RemoteEpisode.Series.Id));
+
                     return true;
                 }
+
+                _logger.Debug()
+                       .Message("No Episodes were just imported, but all episodes were previously imported, possible issue with download history.")
+                       .Property("SeriesId", trackedDownload.RemoteEpisode.Series.Id)
+                       .Property("DownloadId", trackedDownload.DownloadItem.DownloadId)
+                       .Property("Title", trackedDownload.DownloadItem.Title)
+                       .Property("Path", trackedDownload.DownloadItem.OutputPath.ToString())
+                       .WriteSentryWarn("DownloadHistoryIncomplete")
+                       .Write();
             }
 
             _logger.Debug("Not all episodes have been imported for {0}", trackedDownload.DownloadItem.Title);

src/NzbDrone.Core/Download/History/DownloadHistoryService.cs

@@ -148,7 +148,7 @@ namespace NzbDrone.Core.Download.History
             var history = new DownloadHistory
             {
                 EventType = DownloadHistoryEventType.FileImported,
-                SeriesId = message.EpisodeInfo.Series.Id,
+                SeriesId = message.ImportedEpisode.SeriesId,
                 DownloadId = downloadId,
                 SourceTitle = message.EpisodeInfo.Path,
                 Date = DateTime.UtcNow,
@@ -166,19 +166,21 @@ namespace NzbDrone.Core.Download.History
 
         public void Handle(DownloadCompletedEvent message)
         {
+            var downloadItem = message.TrackedDownload.DownloadItem;
+
             var history = new DownloadHistory
             {
                 EventType = DownloadHistoryEventType.DownloadImported,
                 SeriesId = message.SeriesId,
-                DownloadId = message.TrackedDownload.DownloadItem.DownloadId,
-                SourceTitle = message.TrackedDownload.DownloadItem.OutputPath.ToString(),
+                DownloadId = downloadItem.DownloadId,
+                SourceTitle = downloadItem.Title,
                 Date = DateTime.UtcNow,
                 Protocol = message.TrackedDownload.Protocol,
                 DownloadClientId = message.TrackedDownload.DownloadClient
             };
 
-            history.Data.Add("DownloadClient", message.TrackedDownload.DownloadItem.DownloadClientInfo.Type);
-            history.Data.Add("DownloadClientName", message.TrackedDownload.DownloadItem.DownloadClientInfo.Name);
+            history.Data.Add("DownloadClient", downloadItem.DownloadClientInfo.Type);
+            history.Data.Add("DownloadClientName", downloadItem.DownloadClientInfo.Name);
 
             _repository.Insert(history);
         }