Updated exception handler to ignore certain types of exceptions.

src/NzbDrone.Api/Frontend/Mappers/MediaCoverMapper.cs

@@ -13,11 +13,13 @@ namespace NzbDrone.Api.Frontend.Mappers
         private static readonly Regex RegexResizedImage = new Regex(@"-\d+\.jpg($|\?)", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private readonly IAppFolderInfo _appFolderInfo;
+        private readonly IDiskProvider _diskProvider;
 
         public MediaCoverMapper(IAppFolderInfo appFolderInfo, IDiskProvider diskProvider, Logger logger)
             : base(diskProvider, logger)
         {
             _appFolderInfo = appFolderInfo;
+            _diskProvider = diskProvider;
         }
 
         public override string Map(string resourceUrl)
@@ -25,25 +27,18 @@ namespace NzbDrone.Api.Frontend.Mappers
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = path.Trim(Path.DirectorySeparatorChar);
 
-            return Path.Combine(_appFolderInfo.GetAppDataPath(), path);
+            var resourcePath = Path.Combine(_appFolderInfo.GetAppDataPath(), path);
-        }
 
-        public override Response GetResponse(string resourceUrl)
+            if (!_diskProvider.FileExists(resourcePath) || _diskProvider.GetFileSize(resourcePath) == 0)
-        {
-            var result =  base.GetResponse(resourceUrl);
-
-            // Return the full sized image if someone requests a non-existing resized one.
-            // TODO: This code can be removed later once everyone had the update for a while.
-            if (result is NotFoundResponse)
             {
-                var baseResourceUrl = RegexResizedImage.Replace(resourceUrl, ".jpg$1");
+                var baseResourcePath = RegexResizedImage.Replace(resourcePath, ".jpg$1");
-                if (baseResourceUrl != resourceUrl)
+                if (baseResourcePath != resourcePath)
                 {
-                    result = base.GetResponse(baseResourceUrl);
+                    return baseResourcePath;
                 }
             }
 
-            return result;
+            return resourcePath;
         }
 
         public override bool CanHandle(string resourceUrl)

src/NzbDrone.Api/MediaCovers/MediaCoverModule.cs

@@ -29,7 +29,7 @@ namespace NzbDrone.Api.MediaCovers
         {
             var filePath = Path.Combine(_appFolderInfo.GetAppDataPath(), "MediaCover", seriesId.ToString(), filename);
 
-            if (!_diskProvider.FileExists(filePath))
+            if (!_diskProvider.FileExists(filePath) || _diskProvider.GetFileSize(filePath) == 0)
             {
                 // Return the full sized image if someone requests a non-existing resized one.
                 // TODO: This code can be removed later once everyone had the update for a while.

src/NzbDrone.Common/Instrumentation/GlobalExceptionHandlers.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using NLog;
+using NzbDrone.Common.EnvironmentInfo;
 
 namespace NzbDrone.Common.Instrumentation
 {
@@ -9,18 +10,22 @@ namespace NzbDrone.Common.Instrumentation
         private static readonly Logger Logger = NzbDroneLogger.GetLogger(typeof(GlobalExceptionHandlers));
         public static void Register()
         {
-            AppDomain.CurrentDomain.UnhandledException += ((s, e) => AppDomainException(e.ExceptionObject as Exception));
+            AppDomain.CurrentDomain.UnhandledException += HandleAppDomainException;
-            TaskScheduler.UnobservedTaskException += ((s, e) => TaskException(e.Exception));
+            TaskScheduler.UnobservedTaskException += HandleTaskException;
         }
 
-        private static void TaskException(Exception exception)
+        private static void HandleTaskException(object sender, UnobservedTaskExceptionEventArgs e)
         {
+            var exception = e.Exception;
+
             Console.WriteLine("Task Error: {0}", exception);
             Logger.Error("Task Error: " + exception.Message, exception);
         }
 
-        private static void AppDomainException(Exception exception)
+        private static void HandleAppDomainException(object sender, UnhandledExceptionEventArgs e)
         {
+            var exception = e.ExceptionObject as Exception;
+
             if (exception == null) return;
 
             if (exception is NullReferenceException &&
@@ -30,13 +35,18 @@ namespace NzbDrone.Common.Instrumentation
                 return;
             }
 
+            if (OsInfo.IsMonoRuntime)
+            {
+                if (exception is TypeInitializationException && exception.InnerException is DllNotFoundException ||
+                    exception is DllNotFoundException)
+                {
+                    Logger.DebugException("Minor Fail: " + exception.Message, exception);
+                    return;
+                }
+            }
+
             Console.WriteLine("EPIC FAIL: {0}", exception);
             Logger.FatalException("EPIC FAIL: " + exception.Message, exception);
-
-            if (exception.InnerException != null)
-            {
-                AppDomainException(exception.InnerException);
-            }
         }
     }
 }

src/NzbDrone.Core.Test/MediaCoverTests/ImageResizerFixture.cs

@@ -26,6 +26,14 @@ namespace NzbDrone.Core.Test.MediaCoverTests
             Mocker.GetMock<IDiskProvider>()
                   .Setup(v => v.OpenWriteStream(It.IsAny<string>()))
                   .Returns<string>(s => new FileStream(s, FileMode.Create));
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.FileExists(It.IsAny<string>()))
+                  .Returns<string>(s => File.Exists(s));
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.DeleteFile(It.IsAny<string>()))
+                  .Callback<string>(s => File.Delete(s));
         }
 
         [Test]
@@ -46,5 +54,18 @@ namespace NzbDrone.Core.Test.MediaCoverTests
             image.Height.Should().Be(170);
             image.Width.Should().Be(170);
         }
+
+        [Test]
+        public void should_delete_file_if_failed()
+        {
+            var mainFile = Path.Combine(TempFolder, "junk.png");
+            var resizedFile = Path.Combine(TempFolder, "junk-170.png");
+
+            File.WriteAllText(mainFile, "Just some junk data that should make it throw an Exception.");
+
+            Assert.Throws(Is.InstanceOf<Exception>(), () => Subject.Resize(mainFile, resizedFile, 170));
+
+            File.Exists(resizedFile).Should().BeFalse();
+        }
     }
 }

src/NzbDrone.Core.Test/MediaCoverTests/MediaCoverServiceFixture.cs

@@ -11,6 +11,7 @@ using NzbDrone.Core.MediaCover;
 using NzbDrone.Core.Test.Framework;
 using NzbDrone.Core.Tv;
 using NzbDrone.Core.Tv.Events;
+using NzbDrone.Test.Common;
 
 namespace NzbDrone.Core.Test.MediaCoverTests
 {
@@ -110,10 +111,56 @@ namespace NzbDrone.Core.Test.MediaCoverTests
                   .Setup(v => v.FileExists(It.IsAny<string>()))
                   .Returns(true);
 
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.GetFileSize(It.IsAny<string>()))
+                  .Returns(1000);
+
             Subject.HandleAsync(new SeriesUpdatedEvent(_series));
 
             Mocker.GetMock<IImageResizer>()
                   .Verify(v => v.Resize(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>()), Times.Never());
         }
+
+        [Test]
+        public void should_resize_covers_if_existing_is_empty()
+        {
+            Mocker.GetMock<ICoverExistsSpecification>()
+                  .Setup(v => v.AlreadyExists(It.IsAny<string>(), It.IsAny<string>()))
+                  .Returns(true);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.FileExists(It.IsAny<string>()))
+                  .Returns(true);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.GetFileSize(It.IsAny<string>()))
+                  .Returns(0);
+
+            Subject.HandleAsync(new SeriesUpdatedEvent(_series));
+
+            Mocker.GetMock<IImageResizer>()
+                  .Verify(v => v.Resize(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>()), Times.Exactly(2));
+        }
+
+        [Test]
+        public void should_log_error_if_resize_failed()
+        {
+            Mocker.GetMock<ICoverExistsSpecification>()
+                  .Setup(v => v.AlreadyExists(It.IsAny<string>(), It.IsAny<string>()))
+                  .Returns(true);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.FileExists(It.IsAny<string>()))
+                  .Returns(false);
+
+            Mocker.GetMock<IImageResizer>()
+                  .Setup(v => v.Resize(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>()))
+                  .Throws<ApplicationException>();
+
+            Subject.HandleAsync(new SeriesUpdatedEvent(_series));
+
+            Mocker.GetMock<IImageResizer>()
+                  .Verify(v => v.Resize(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<int>()), Times.Exactly(2));
+        }
     }
 }

src/NzbDrone.Core/MediaCover/ImageResizer.cs

@@ -22,18 +22,29 @@ namespace NzbDrone.Core.MediaCover
 
         public void Resize(string source, string destination, int height)
         {
-            using (var sourceStream = _diskProvider.OpenReadStream(source))
+            try
             {
-                using (var outputStream = _diskProvider.OpenWriteStream(destination))
+                using (var sourceStream = _diskProvider.OpenReadStream(source))
                 {
-                    var settings = new Instructions();
+                    using (var outputStream = _diskProvider.OpenWriteStream(destination))
-                    settings.Height = height;
+                    {
+                        var settings = new Instructions();
+                        settings.Height = height;
 
-                    var job = new ImageJob(sourceStream, outputStream, settings);
+                        var job = new ImageJob(sourceStream, outputStream, settings);
 
-                    ImageBuilder.Current.Build(job);
+                        ImageBuilder.Current.Build(job);
+                    }
                 }
             }
+            catch
+            {
+                if (_diskProvider.FileExists(destination))
+                {
+                    _diskProvider.DeleteFile(destination);
+                }
+                throw;
+            }
         }
     }
 }

src/NzbDrone.Core/MediaCover/MediaCoverService.cs

@@ -88,16 +88,13 @@ namespace NzbDrone.Core.MediaCover
             foreach (var cover in series.Images)
             {
                 var fileName = GetCoverPath(series.Id, cover.CoverType);
+                var alreadyExists = false;
                 try
                 {
-                    if (!_coverExistsSpecification.AlreadyExists(cover.Url, fileName))
+                    alreadyExists = _coverExistsSpecification.AlreadyExists(cover.Url, fileName);
+                    if (!alreadyExists)
                     {
                         DownloadCover(series, cover);
-                        EnsureResizedCovers(series, cover, true);
-                    }
-                    else
-                    {
-                        EnsureResizedCovers(series, cover, false);
                     }
                 }
                 catch (WebException e)
@@ -108,6 +105,8 @@ namespace NzbDrone.Core.MediaCover
                 {
                     _logger.ErrorException("Couldn't download media cover for " + series, e);
                 }
+
+                EnsureResizedCovers(series, cover, !alreadyExists);
             }
         }
 
@@ -148,11 +147,18 @@ namespace NzbDrone.Core.MediaCover
                 var mainFileName = GetCoverPath(series.Id, cover.CoverType);
                 var resizeFileName = GetCoverPath(series.Id, cover.CoverType, height);
 
-                if (forceResize || !_diskProvider.FileExists(resizeFileName))
+                if (forceResize || !_diskProvider.FileExists(resizeFileName) || _diskProvider.GetFileSize(resizeFileName) == 0)
                 {
                     _logger.Debug("Resizing {0}-{1} for {2}", cover.CoverType, height, series);
 
-                    _resizer.Resize(mainFileName, resizeFileName, height);
+                    try
+                    {
+                        _resizer.Resize(mainFileName, resizeFileName, height);
+                    }
+                    catch
+                    {
+                        _logger.Debug("Couldn't resize media cover {0}-{1} for {2}, using full size image instead.", cover.CoverType, height, series);
+                    }
                 }
             }
         }