Pass ILog instance to task scheduler's exception handler

Author: odinserj

src/Hangfire.Core/Server/BackgroundProcessDispatcherBuilderAsync.cs

@@ -26,12 +26,12 @@ internal sealed class BackgroundProcessDispatcherBuilderAsync : IBackgroundProce
     {
         private readonly int _maxConcurrency;
         private readonly bool _ownsScheduler;
-        private readonly Func<TaskScheduler> _taskScheduler;
+        private readonly Func<ILog, TaskScheduler> _taskScheduler;
         private readonly IBackgroundProcessAsync _process;
 
         public BackgroundProcessDispatcherBuilderAsync(
             [NotNull] IBackgroundProcessAsync process,
-            [NotNull] Func<TaskScheduler> taskScheduler,
+            [NotNull] Func<ILog, TaskScheduler> taskScheduler,
             int maxConcurrency,
             bool ownsScheduler)
         {
@@ -66,7 +66,7 @@ public IBackgroundDispatcher Create(BackgroundServerContext context, BackgroundP
                 processLogger,
                 ExecuteProcess,
                 Tuple.Create(_process, context, execution, processLogger),
-                _taskScheduler(),
+                _taskScheduler(processLogger),
                 _maxConcurrency,
                 _ownsScheduler);
         }

src/Hangfire.Core/Server/BackgroundProcessExtensions.cs

@@ -103,12 +103,12 @@ public static IBackgroundProcessDispatcherBuilder UseBackgroundPool(
             if (maxConcurrency <= 0) throw new ArgumentOutOfRangeException(nameof(maxConcurrency));
             if (threadFactory == null) throw new ArgumentNullException(nameof(threadFactory));
 
-            Func<TaskScheduler> createScheduler = () => new BackgroundTaskScheduler(
+            Func<ILog, TaskScheduler> createScheduler = logger => new BackgroundTaskScheduler(
                 threadStart => threadFactory(process.GetType().Name, threadStart),
-                static exception =>
+                exception =>
                 {
-                    LogProvider.GetLogger(typeof(BackgroundTaskScheduler)).FatalException(
-                        "Unhandled exception occurred in scheduler. Please report it to Hangfire developers",
+                    logger.FatalException(
+                        $"Unhandled exception occurred in `{nameof(BackgroundTaskScheduler)}`. Please report this to Hangfire developers.",
                         exception);
                 });
 
@@ -128,7 +128,7 @@ public static IBackgroundProcessDispatcherBuilder UseThreadPool(
             if (process == null) throw new ArgumentNullException(nameof(process));
             if (maxConcurrency <= 0) throw new ArgumentOutOfRangeException(nameof(maxConcurrency));
 
-            return new BackgroundProcessDispatcherBuilderAsync(process, static () => TaskScheduler.Default, maxConcurrency, false);
+            return new BackgroundProcessDispatcherBuilderAsync(process, static _ => TaskScheduler.Default, maxConcurrency, false);
         }
 
         internal static IEnumerable<Thread> DefaultThreadFactory(