From 0d19f645e8055b6d1fda2e58430b4844e930ce50 Mon Sep 17 00:00:00 2001
From: Taloth Saldono <Taloth@users.noreply.github.com>
Date: Sun, 17 Jan 2016 19:22:43 +0100
Subject: [PATCH] Fixed: Don't apply indexer backoff on DNS and connection
 issues.

Fixes #751
---
 src/NzbDrone.Core/Indexers/HttpIndexerBase.cs | 11 ++++++++++-
 .../Indexers/IndexerStatusService.cs          | 19 +++++++++++++++++--
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/src/NzbDrone.Core/Indexers/HttpIndexerBase.cs b/src/NzbDrone.Core/Indexers/HttpIndexerBase.cs
index f7713faa8..ad89cf3c7 100644
--- a/src/NzbDrone.Core/Indexers/HttpIndexerBase.cs
+++ b/src/NzbDrone.Core/Indexers/HttpIndexerBase.cs
@@ -202,7 +202,16 @@ namespace NzbDrone.Core.Indexers
             }
             catch (WebException webException)
             {
-                _indexerStatusService.RecordFailure(Definition.Id);
+                if (webException.Status == WebExceptionStatus.NameResolutionFailure ||
+                    webException.Status == WebExceptionStatus.ConnectFailure)
+                {
+                    _indexerStatusService.RecordConnectionFailure(Definition.Id);
+                }
+                else
+                {
+                    _indexerStatusService.RecordFailure(Definition.Id);
+                }
+
                 if (webException.Message.Contains("502") || webException.Message.Contains("503") ||
                     webException.Message.Contains("timed out"))
                 {
diff --git a/src/NzbDrone.Core/Indexers/IndexerStatusService.cs b/src/NzbDrone.Core/Indexers/IndexerStatusService.cs
index 5a43638ee..ed977cb2f 100644
--- a/src/NzbDrone.Core/Indexers/IndexerStatusService.cs
+++ b/src/NzbDrone.Core/Indexers/IndexerStatusService.cs
@@ -15,6 +15,7 @@ namespace NzbDrone.Core.Indexers
         ReleaseInfo GetLastRssSyncReleaseInfo(int indexerId);
         void RecordSuccess(int indexerId);
         void RecordFailure(int indexerId, TimeSpan minimumBackOff = default(TimeSpan));
+        void RecordConnectionFailure(int indexerId);
 
         void UpdateRssSyncStatus(int indexerId, ReleaseInfo releaseInfo);
     }
@@ -85,7 +86,7 @@ namespace NzbDrone.Core.Indexers
             }
         }
 
-        public void RecordFailure(int indexerId, TimeSpan minimumBackOff = default(TimeSpan))
+        protected void RecordFailure(int indexerId, TimeSpan minimumBackOff, bool escalate)
         {
             lock (_syncRoot)
             {
@@ -99,7 +100,10 @@ namespace NzbDrone.Core.Indexers
                 }
 
                 status.MostRecentFailure = now;
-                status.EscalationLevel = Math.Min(MaximumEscalationLevel, status.EscalationLevel + 1);
+                if (escalate)
+                {
+                    status.EscalationLevel = Math.Min(MaximumEscalationLevel, status.EscalationLevel + 1);
+                }
 
                 if (minimumBackOff != TimeSpan.Zero)
                 {
@@ -115,6 +119,17 @@ namespace NzbDrone.Core.Indexers
             }
         }
 
+        public void RecordFailure(int indexerId, TimeSpan minimumBackOff = default(TimeSpan))
+        {
+            RecordFailure(indexerId, minimumBackOff, true);
+        }
+
+        public void RecordConnectionFailure(int indexerId)
+        {
+            RecordFailure(indexerId, default(TimeSpan), false);
+        }
+
+
         public void UpdateRssSyncStatus(int indexerId, ReleaseInfo releaseInfo)
         {
             lock (_syncRoot)