Warning message when BTN API throw internal server error

src/NzbDrone.Core/Indexers/BroadcastheNet/BroadcastheNetParser.cs

@@ -32,7 +32,13 @@ namespace NzbDrone.Core.Indexers.BroadcastheNet
                     break;
             }
 
-            var jsonResponse = new HttpResponse<JsonRpcResponse<BroadcastheNetTorrents>>(indexerResponse.HttpResponse).Resource;
+            if (indexerResponse.Content == "Query execution was interrupted")
+            {
+                throw new IndexerException(indexerResponse, "Indexer API returned an internal server error");
+            }
+
+
+            JsonRpcResponse<BroadcastheNetTorrents> jsonResponse = new HttpResponse<JsonRpcResponse<BroadcastheNetTorrents>>(indexerResponse.HttpResponse).Resource;
 
             if (jsonResponse.Error != null || jsonResponse.Result == null)
             {

src/NzbDrone.Core/Indexers/HttpIndexerBase.cs

@@ -306,13 +306,19 @@ namespace NzbDrone.Core.Indexers
             }
             catch (UnsupportedFeedException ex)
             {
-                _logger.WarnException("Indexer feed is not supported: " + ex.Message, ex);
+                _logger.WarnException("Indexer feed is not supported", ex);
 
                 return new ValidationFailure(string.Empty, "Indexer feed is not supported: " + ex.Message);
             }
+            catch (IndexerException ex)
+            {
+                _logger.WarnException("Unable to connect to indexer", ex);
+
+                return new ValidationFailure(string.Empty, "Unable to connect to indexer. " + ex.Message);
+            }
             catch (Exception ex)
             {
-                _logger.WarnException("Unable to connect to indexer: " + ex.Message, ex);
+                _logger.WarnException("Unable to connect to indexer", ex);
 
                 return new ValidationFailure(string.Empty, "Unable to connect to indexer, check the log for more details");
             }