Fixed: Inaccessible path leading to import process being aborted before processing all items

src/NzbDrone.Core/Download/DownloadProcessingService.cs

@@ -1,5 +1,7 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
+using NLog;
 using NzbDrone.Core.Configuration;
 using NzbDrone.Core.Download.TrackedDownloads;
 using NzbDrone.Core.Messaging.Commands;
@@ -14,18 +16,21 @@ namespace NzbDrone.Core.Download
         private readonly IFailedDownloadService _failedDownloadService;
         private readonly ITrackedDownloadService _trackedDownloadService;
         private readonly IEventAggregator _eventAggregator;
+        private readonly ILogger _logger;
 
         public DownloadProcessingService(IConfigService configService,
                                          ICompletedDownloadService completedDownloadService,
                                          IFailedDownloadService failedDownloadService,
                                          ITrackedDownloadService trackedDownloadService,
-                                         IEventAggregator eventAggregator)
+                                         IEventAggregator eventAggregator,
+                                         ILogger logger)
         {
             _configService = configService;
             _completedDownloadService = completedDownloadService;
             _failedDownloadService = failedDownloadService;
             _trackedDownloadService = trackedDownloadService;
             _eventAggregator = eventAggregator;
+            _logger = logger;
         }
 
         private void RemoveCompletedDownloads(List<TrackedDownload> trackedDownloads)
@@ -42,6 +47,8 @@ namespace NzbDrone.Core.Download
             var trackedDownloads = _trackedDownloadService.GetTrackedDownloads();
 
             foreach (var trackedDownload in trackedDownloads)
+            {
+                try
                 {
                     if (trackedDownload.State == TrackedDownloadState.DownloadFailedPending)
                     {
@@ -53,6 +60,11 @@ namespace NzbDrone.Core.Download
                         _completedDownloadService.Import(trackedDownload);
                     }
                 }
+                catch (Exception e)
+                {
+                    _logger.Debug(e, "Failed to process download: {0}", trackedDownload.DownloadItem.Title);
+                }
+            }
 
             if (enableCompletedDownloadHandling && _configService.RemoveCompletedDownloads)
             {

src/NzbDrone.Core/MediaFiles/DownloadedBooksImportService.cs

@@ -78,6 +78,8 @@ namespace NzbDrone.Core.MediaFiles
 
         public List<ImportResult> ProcessPath(string path, ImportMode importMode = ImportMode.Auto, Author author = null, DownloadClientItem downloadClientItem = null)
         {
+            _logger.Debug("Processing path: {0}", path);
+
             if (_diskProvider.FolderExists(path))
             {
                 var directoryInfo = _diskProvider.GetDirectoryInfo(path);
@@ -335,6 +337,12 @@ namespace NzbDrone.Core.MediaFiles
                 var mounts = _diskProvider.GetMounts();
                 var mount = mounts.FirstOrDefault(m => m.RootDirectory == Path.GetPathRoot(path));
 
+                if (mount == null)
+                {
+                    _logger.Error("Import failed, path does not exist or is not accessible by Lidarr: {0}. Unable to find a volume mounted for the path. If you're using a mapped network drive see the FAQ for more info", path);
+                    return;
+                }
+
                 if (mount.DriveType == DriveType.Network)
                 {
                     _logger.Error("Import failed, path does not exist or is not accessible by Readarr: {0}. It's recommended to avoid mapped network drives when running as a Windows service. See the FAQ for more info", path);