Fixed: Relax SingleInstancePolicy when using a custom data directory Fixes #1765 (#1782)

src/NzbDrone.Host/Bootstrap.cs

@@ -88,11 +88,15 @@ namespace Radarr.Host
         {
             var instancePolicy = _container.Resolve<ISingleInstancePolicy>();
 
-            if (isService)
+            if (startupContext.Flags.Contains(StartupContext.TERMINATE))
             {
                 instancePolicy.KillAllOtherInstance();
             }
-            else if (startupContext.Flags.Contains(StartupContext.TERMINATE))
+            else if (startupContext.Args.ContainsKey(StartupContext.APPDATA))
+            {
+                instancePolicy.WarnIfAlreadyRunning();
+            }
+            else if (isService)
             {
                 instancePolicy.KillAllOtherInstance();
             }

src/NzbDrone.Host/SingleInstancePolicy.cs

@@ -10,6 +10,7 @@ namespace Radarr.Host
     {
         void PreventStartIfAlreadyRunning();
         void KillAllOtherInstance();
+        void WarnIfAlreadyRunning();
     }
 
     public class SingleInstancePolicy : ISingleInstancePolicy
@@ -45,6 +46,14 @@ namespace Radarr.Host
             }
         }
 
+        public void WarnIfAlreadyRunning()
+        {
+            if (IsAlreadyRunning())
+            {
+                _logger.Debug("Another instance of Radarr is already running.");
+            }
+        }
+
         private bool IsAlreadyRunning()
         {
             return GetOtherNzbDroneProcessIds().Any();
@@ -64,14 +73,14 @@ namespace Radarr.Host
 
                 if (otherProcesses.Any())
                 {
-                    _logger.Info("{0} instance(s) of Sonarr are running", otherProcesses.Count);
+                    _logger.Info("{0} instance(s) of Radarr are running", otherProcesses.Count);
                 }
 
                 return otherProcesses;
             }
             catch (Exception ex)
             {
-                _logger.Warn(ex, "Failed to check for multiple instances of Sonarr.");
+                _logger.Warn(ex, "Failed to check for multiple instances of Radarr.");
                 return new List<int>();
             }
         }