sanitize queue processing

MareSynchronosServer/MareSynchronosStaticFilesServer/Services/RequestQueueService.cs

@@ -35,6 +35,8 @@ public class RequestQueueService : IHostedService
             return QueueStatus.Waiting;
         }
 
+        try
+        {
             await _queueSemaphore.WaitAsync().ConfigureAwait(false);
             QueueStatus status = QueueStatus.Waiting;
             var idx = Array.FindIndex(_userQueueRequests, r => r == null);
@@ -48,10 +50,20 @@ public class RequestQueueService : IHostedService
                 DequeueIntoSlot(request, idx);
                 status = QueueStatus.Ready;
             }
-        _queueSemaphore.Release();
 
             return status;
         }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error during EnqueueUser");
+        }
+        finally
+        {
+            _queueSemaphore.Release();
+        }
+
+        throw new Exception("Error during EnqueueUser");
+    }
 
     public bool StillEnqueued(Guid request, string user, out int queuePosition)
     {
@@ -91,6 +103,8 @@ public class RequestQueueService : IHostedService
     private async Task ProcessRequestQueue(CancellationToken ct)
     {
         while (!ct.IsCancellationRequested)
+        {
+            try
             {
                 await _queueProcessingSemaphore.WaitAsync(ct).ConfigureAwait(false);
                 await _queueSemaphore.WaitAsync(ct).ConfigureAwait(false);
@@ -108,8 +122,17 @@ public class RequestQueueService : IHostedService
 
                     if (!_queue.Any()) break;
                 }
+
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error during Queue processing");
+            }
+            finally
+            {
                 _queueProcessingSemaphore.Release();
                 _queueSemaphore.Release();
+            }
 
             _metrics.SetGaugeTo(MetricsAPI.GaugeDownloadQueue, _queue.Count);