* Remove a bug I created in r5171 where taking an object would terminate the client session

* change code to use an explicit state variable instead of using SOG.Name = null to signal deletion

OpenSim/Region/Environment/Modules/World/Archiver/ArchiveReadRequest.cs

@@ -31,6 +31,7 @@ using OpenSim.Region.Environment.Modules.World.Serialiser;
 using System;
 using System.IO;
 using System.Reflection;
+using System.Xml;
 using libsecondlife;
 using log4net;
 
@@ -101,6 +102,20 @@ namespace OpenSim.Region.Environment.Modules.World.Archiver
             m_log.InfoFormat("[ARCHIVER]: Loading prim data");
 
             IRegionSerialiser serialiser = m_scene.RequestModuleInterface<IRegionSerialiser>();
+            
+            // Temporary code to read each sog in the file separately, pending actually having these in separate files
+//            XmlTextReader xtr = new XmlTextReader(new StringReader(serializedPrims));            
+//            XmlDocument doc = new XmlDocument();
+//            reader.WhitespaceHandling = WhitespaceHandling.None;
+//            doc.Load(xtr);
+//            xtr.Close();
+//            XmlNode sceneNode = doc.FirstChild;
+//
+//            foreach (XmlNode objectNode in sceneNode.ChildNodes)
+//            {
+//                CreatePrimFromXml2(m_scene, objectNode.OuterXml);
+//            }
+            
             serialiser.LoadPrimsFromXml2(m_scene, new StringReader(serializedPrims));
         }
     }

OpenSim/Region/Environment/Modules/World/Serialiser/SceneXmlLoader.cs

@@ -114,6 +114,7 @@ namespace OpenSim.Region.Environment.Scenes
             doc.Load(reader);
             reader.Close();
             rootNode = doc.FirstChild;
+            
             foreach (XmlNode aPrimNode in rootNode.ChildNodes)
             {
                 CreatePrimFromXml2(scene, aPrimNode.OuterXml);

OpenSim/Region/Environment/Scenes/EntityBase.cs

@@ -64,6 +64,15 @@ namespace OpenSim.Region.Environment.Scenes
             set { m_name = value; }
         }
                 
+        /// <summary>
+        /// Signals whether this group was in a scene but has since been deleted from it.
+        /// </summary>
+        public bool IsDeleted
+        {
+            get { return m_isDeleted; }
+        }
+        protected bool m_isDeleted;        
+
         protected LLVector3 m_pos;
 
         /// <summary>

OpenSim/Region/Environment/Scenes/InnerScene.cs

@@ -293,21 +293,23 @@ namespace OpenSim.Region.Environment.Scenes
                     // Don't abort the whole update if one entity happens to give us an exception.
                     try
                     {
-                        // A null name signals that this group was deleted before the scheduled update
+                        // Check that the group was not deleted before the scheduled update
                         // FIXME: This is merely a temporary measure to reduce the incidence of failure, when
                         // an object has been deleted from a scene before update was processed.
                         // A more fundamental overhaul of the update mechanism is required to eliminate all
                         // the race conditions.
-                        if (entity.Name != null)
+                        if (!entity.IsDeleted)
                         {
                             m_updateList[i].Update();
                         }
                     }
                     catch (Exception e)
                     {
-                        m_log.ErrorFormat("[INNER SCENE]: Failed to update {0}, - {1}", entity.Name, e);//entity.m_uuid
+                        m_log.ErrorFormat(
+                            "[INNER SCENE]: Failed to update {0}, {1} - {2}", entity.Name, entity.UUID, e);
                     }
                 }
+                
                 m_updateList.Clear();
             }
         }

OpenSim/Region/Environment/Scenes/Scene.cs

@@ -1665,7 +1665,7 @@ namespace OpenSim.Region.Environment.Scenes
         }
 
         /// <summary>
-        /// Delete this object from the scene.
+        /// Delete the given object from the scene.
         /// </summary>
         /// <param name="group"></param>
         public void DeleteSceneObject(SceneObjectGroup group)
@@ -1686,14 +1686,6 @@ namespace OpenSim.Region.Environment.Scenes
 
             group.DeleteGroup();
             group.DeleteParts();
-
-            // In case anybody else retains a reference to this group, signal deletion by changing the name
-            // to null.  We can't zero out the UUID because this is taken from the root part, which has already
-            // been removed.
-            // FIXME: This is a really poor temporary solution, since it still leaves plenty of scope for race
-            // conditions where a user deletes an entity while it is being stored.  Really, the update
-            // code needs a redesign.
-            group.Name = null;
         }
 
         /// <summary>

OpenSim/Region/Environment/Scenes/SceneObjectGroup.cs

@@ -921,10 +921,16 @@ namespace OpenSim.Region.Environment.Scenes
         }
 
         /// <summary>
-        /// Completely delete this group and tell all the scene presences about that deletion.
+        /// Delete this group from its scene and tell all the scene presences about that deletion.
         /// </summary>
         public void DeleteGroup()
         {
+            // We need to keep track of this state in case this group is still queued for backup.            
+            // FIXME: This is a poor temporary solution, since it still leaves plenty of scope for race
+            // conditions where a user deletes an entity while it is being stored.  Really, the update
+            // code needs a redesign.            
+            m_isDeleted = true;
+            
             DetachFromBackup(this);
 
             lock (m_parts)
@@ -944,6 +950,7 @@ namespace OpenSim.Region.Environment.Scenes
                 }
             }
         }
+        
         public void FakeDeleteGroup()
         {
             foreach (SceneObjectPart part in m_parts.Values)