Implemented a Watchdog class. Do not manually create Thread objects anymore, use Watchdog.StartThread(). While your thread is running call Watchdog.UpdateThread(). When it is shutting down call Watchdog.RemoveThread(). Most of the threads in OpenSim have been updated

OpenSim/Client/MXP/PacketHandler/MXPPacketServer.cs

@@ -85,10 +85,7 @@ namespace OpenSim.Client.MXP.PacketHandler
 
             m_transmitter = new Transmitter(port);
 
-            m_clientThread = new Thread(StartListener);
+            StartListener();
-            m_clientThread.Name = "MXPThread";
-            m_clientThread.IsBackground = true;
-            m_clientThread.Start();
         }
 
         public void StartListener()

OpenSim/Framework/Servers/HttpServer/BaseHttpServer.cs

@@ -1559,15 +1559,7 @@ namespace OpenSim.Framework.Servers.HttpServer
         public void Start()
         {
             m_log.Info("[HTTPD]: Starting up HTTP Server");
-
-            //m_workerThread = new Thread(new ThreadStart(StartHTTP));
-            //m_workerThread.Name = "HttpThread";
-            //m_workerThread.IsBackground = true;
-            //m_workerThread.Start();
-            //ThreadTracker.Add(m_workerThread);
             StartHTTP();
-            
-
         }
 
         private void StartHTTP()

OpenSim/Framework/Servers/HttpServer/PollServiceRequestManager.cs

@@ -50,9 +50,7 @@ namespace OpenSim.Framework.Servers.HttpServer
             m_WorkerThreadCount = pWorkerThreadCount;
             m_workerThreads = new Thread[m_WorkerThreadCount];
             m_PollServiceWorkerThreads = new PollServiceWorkerThread[m_WorkerThreadCount];
-            m_watcherThread = new Thread(ThreadStart);
 
-            
             //startup worker threads
             for (uint i=0;i<m_WorkerThreadCount;i++)
             {
@@ -65,11 +63,11 @@ namespace OpenSim.Framework.Servers.HttpServer
                 m_workerThreads[i].Start();
                 
             }
+
             //start watcher threads
+            m_watcherThread = new Thread(ThreadStart);
             m_watcherThread.Name = "PollServiceWatcherThread";
             m_watcherThread.Start();
-
-
         }
 
         internal void ReQueueEvent(PollServiceHttpRequest req)

OpenSim/Framework/Watchdog.cs

@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Threading;
+
+namespace OpenSim.Framework
+{
+    /// <summary>
+    /// Manages launching threads and keeping watch over them for timeouts
+    /// </summary>
+    public static class Watchdog
+    {
+        /// <summary>Timer interval in milliseconds for the watchdog timer</summary>
+        const double WATCHDOG_INTERVAL_MS = 2500.0d;
+        /// <summary>Maximum timeout in milliseconds before a thread is considered dead</summary>
+        const int WATCHDOG_TIMEOUT_MS = 5000;
+
+        [System.Diagnostics.DebuggerDisplay("{Thread.Name}")]
+        private class ThreadWatchdogInfo
+        {
+            public Thread Thread;
+            public int LastTick;
+
+            public ThreadWatchdogInfo(Thread thread)
+            {
+                Thread = thread;
+                LastTick = Environment.TickCount & Int32.MaxValue;
+            }
+        }
+
+        /// <summary>
+        /// This event is called whenever a tracked thread is stopped or
+        /// has not called UpdateThread() in time
+        /// </summary>
+        /// <param name="thread">The thread that has been identified as dead</param>
+        /// <param name="lastTick">The last time this thread called UpdateThread()</param>
+        public delegate void WatchdogTimeout(Thread thread, int lastTick);
+
+        /// <summary>This event is called whenever a tracked thread is
+        /// stopped or has not called UpdateThread() in time</summary>
+        public static event WatchdogTimeout OnWatchdogTimeout;
+
+        private static Dictionary<int, ThreadWatchdogInfo> m_threads;
+        private static System.Timers.Timer m_watchdogTimer;
+
+        static Watchdog()
+        {
+            m_threads = new Dictionary<int, ThreadWatchdogInfo>();
+            m_watchdogTimer = new System.Timers.Timer(WATCHDOG_INTERVAL_MS);
+            m_watchdogTimer.AutoReset = false;
+            m_watchdogTimer.Elapsed += WatchdogTimerElapsed;
+            m_watchdogTimer.Start();
+        }
+
+        /// <summary>
+        /// Start a new thread that is tracked by the watchdog timer
+        /// </summary>
+        /// <param name="start">The method that will be executed in a new thread</param>
+        /// <param name="name">A name to give to the new thread</param>
+        /// <param name="priority">Priority to run the thread at</param>
+        /// <param name="isBackground">True to run this thread as a background
+        /// thread, otherwise false</param>
+        /// <returns>The newly created Thread object</returns>
+        public static Thread StartThread(ThreadStart start, string name, ThreadPriority priority, bool isBackground)
+        {
+            Thread thread = new Thread(start);
+            thread.Name = name;
+            thread.Priority = priority;
+            thread.IsBackground = isBackground;
+            thread.Start();
+
+            lock (m_threads)
+                m_threads.Add(thread.ManagedThreadId, new ThreadWatchdogInfo(thread));
+
+            return thread;
+        }
+
+        /// <summary>
+        /// Marks the current thread as alive
+        /// </summary>
+        public static void UpdateThread()
+        {
+            UpdateThread(Thread.CurrentThread.ManagedThreadId);
+        }
+
+        /// <summary>
+        /// Marks a thread as alive
+        /// </summary>
+        /// <param name="threadID">The ManagedThreadId of the thread to mark as
+        /// alive</param>
+        public static void UpdateThread(int threadID)
+        {
+            ThreadWatchdogInfo threadInfo;
+
+            lock (m_threads)
+            {
+                if (m_threads.TryGetValue(threadID, out threadInfo))
+                {
+                    threadInfo.LastTick = Environment.TickCount & Int32.MaxValue;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Stops watchdog tracking on the current thread
+        /// </summary>
+        /// <returns>True if the thread was removed from the list of tracked
+        /// threads, otherwise false</returns>
+        public static bool RemoveThread()
+        {
+            return RemoveThread(Thread.CurrentThread.ManagedThreadId);
+        }
+
+        /// <summary>
+        /// Stops watchdog tracking on a thread
+        /// </summary>
+        /// <param name="threadID">The ManagedThreadId of the thread to stop
+        /// tracking</param>
+        /// <returns>True if the thread was removed from the list of tracked
+        /// threads, otherwise false</returns>
+        public static bool RemoveThread(int threadID)
+        {
+            lock (m_threads)
+                return m_threads.Remove(threadID);
+        }
+
+        private static void WatchdogTimerElapsed(object sender, System.Timers.ElapsedEventArgs e)
+        {
+            WatchdogTimeout callback = OnWatchdogTimeout;
+
+            if (callback != null)
+            {
+                ThreadWatchdogInfo timedOut = null;
+
+                lock (m_threads)
+                {
+                    int now = Environment.TickCount;
+
+                    foreach (ThreadWatchdogInfo threadInfo in m_threads.Values)
+                    {
+                        if (threadInfo.Thread.ThreadState == ThreadState.Stopped || now - threadInfo.LastTick >= WATCHDOG_TIMEOUT_MS)
+                        {
+                            timedOut = threadInfo;
+                            m_threads.Remove(threadInfo.Thread.ManagedThreadId);
+                            break;
+                        }
+                    }
+                }
+
+                if (timedOut != null)
+                    callback(timedOut.Thread, timedOut.LastTick);
+            }
+
+            m_watchdogTimer.Start();
+        }
+    }
+}

OpenSim/Grid/UserServer.Modules/MessageServersConnector.cs

@@ -78,8 +78,6 @@ namespace OpenSim.Grid.UserServer.Modules
         private OpenSim.Framework.BlockingQueue<PresenceNotification> m_NotifyQueue =
                 new OpenSim.Framework.BlockingQueue<PresenceNotification>();
 
-        Thread m_NotifyThread;
-
         private IGridServiceCore m_core;
 
         public event AgentLocationDelegate OnAgentLocation;
@@ -96,8 +94,8 @@ namespace OpenSim.Grid.UserServer.Modules
         {
             m_core = core;
             m_core.RegisterInterface<MessageServersConnector>(this);
-            m_NotifyThread = new Thread(new ThreadStart(NotifyQueueRunner));
+
-            m_NotifyThread.Start();
+            Watchdog.StartThread(NotifyQueueRunner, "NotifyQueueRunner", ThreadPriority.Normal, true);
         }
 
         public void PostInitialise()
@@ -427,6 +425,8 @@ namespace OpenSim.Grid.UserServer.Modules
                 {
                     TellMessageServersAboutUserLogoffInternal(presence.agentID);
                 }
+
+                Watchdog.UpdateThread();
             }
         }
 

OpenSim/Region/Application/OpenSim.cs

@@ -172,6 +172,9 @@ namespace OpenSim
                 m_scriptTimer.Elapsed += RunAutoTimerScript;
             }
 
+            // Hook up to the watchdog timer
+            Watchdog.OnWatchdogTimeout += WatchdogTimeoutHandler;
+
             PrintFileToConsole("startuplogo.txt");
 
             // For now, start at the 'root' level by default
@@ -384,6 +387,14 @@ namespace OpenSim
             }
         }
 
+        private void WatchdogTimeoutHandler(System.Threading.Thread thread, int lastTick)
+        {
+            int now = Environment.TickCount & Int32.MaxValue;
+
+            m_log.ErrorFormat("[WATCHDOG]: Timeout detected for thread \"{0}\". ThreadState={1}. Last tick was {2}ms ago",
+                thread.Name, thread.ThreadState, now - lastTick);
+        }
+
         #region Console Commands
 
         /// <summary>

OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs

@@ -187,14 +187,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
             base.Start(m_recvBufferSize, m_asyncPacketHandling);
 
-            // Start the incoming packet processing thread
+            // Start the packet processing threads
-            Thread incomingThread = new Thread(IncomingPacketHandler);
+            Watchdog.StartThread(IncomingPacketHandler, "Incoming Packets (" + m_scene.RegionInfo.RegionName + ")", ThreadPriority.Normal, false);
-            incomingThread.Name = "Incoming Packets (" + m_scene.RegionInfo.RegionName + ")";
+            Watchdog.StartThread(OutgoingPacketHandler, "Outgoing Packets (" + m_scene.RegionInfo.RegionName + ")", ThreadPriority.Normal, false);
-            incomingThread.Start();
-
-            Thread outgoingThread = new Thread(OutgoingPacketHandler);
-            outgoingThread.Name = "Outgoing Packets (" + m_scene.RegionInfo.RegionName + ")";
-            outgoingThread.Start();
         }
 
         public new void Stop()
@@ -775,11 +770,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 {
                     m_log.Error("[LLUDPSERVER]: Error in the incoming packet handler loop: " + ex.Message, ex);
                 }
+
+                Watchdog.UpdateThread();
             }
 
             if (packetInbox.Count > 0)
                 m_log.Warn("[LLUDPSERVER]: IncomingPacketHandler is shutting down, dropping " + packetInbox.Count + " packets");
             packetInbox.Clear();
+
+            Watchdog.RemoveThread();
         }
 
         private void OutgoingPacketHandler()
@@ -842,12 +841,16 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     // token bucket could get more tokens
                     if (!m_packetSent)
                         Thread.Sleep((int)TickCountResolution);
+
+                    Watchdog.UpdateThread();
                 }
                 catch (Exception ex)
                 {
                     m_log.Error("[LLUDPSERVER]: OutgoingPacketHandler loop threw an exception: " + ex.Message, ex);
                 }
             }
+
+            Watchdog.RemoveThread();
         }
 
         private void ClientOutgoingPacketHandler(IClientAPI client)

OpenSim/Region/CoreModules/InterGrid/OpenGridProtocolModule.cs

@@ -1208,10 +1208,7 @@ namespace OpenSim.Region.CoreModules.InterGrid
             if (homeScene.TryGetAvatar(avatarId,out avatar))
             {
                 KillAUser ku = new KillAUser(avatar,mod);
-                Thread ta = new Thread(ku.ShutdownNoLogout);
+                Watchdog.StartThread(ku.ShutdownNoLogout, "OGPShutdown", ThreadPriority.Normal, true);
-                ta.IsBackground = true;
-                ta.Name = "ShutdownThread";
-                ta.Start();
             }
         }
 
@@ -1261,7 +1258,13 @@ namespace OpenSim.Region.CoreModules.InterGrid
 
                 avToBeKilled.ControllingClient.SendLogoutPacketWhenClosing = false;
 
-                Thread.Sleep(30000);
+                int sleepMS = 30000;
+                while (sleepMS > 0)
+                {
+                    Watchdog.UpdateThread();
+                    Thread.Sleep(1000);
+                    sleepMS -= 1000;
+                }
 
                 // test for child agent because they might have come back
                 if (avToBeKilled.IsChildAgent)
@@ -1270,6 +1273,8 @@ namespace OpenSim.Region.CoreModules.InterGrid
                     avToBeKilled.ControllingClient.Close();
                 }
             }
+
+            Watchdog.RemoveThread();
         }
         
     }

OpenSim/Region/CoreModules/World/Archiver/AssetsRequest.cs

@@ -128,7 +128,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
             if (m_repliesRequired == 0)
             {
                 m_requestState = RequestState.Completed;
-                PerformAssetsRequestCallback();
+                PerformAssetsRequestCallback(null);
                 return;
             }
             
@@ -246,9 +246,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                         
                         // We want to stop using the asset cache thread asap 
                         // as we now need to do the work of producing the rest of the archive
-                        Thread newThread = new Thread(PerformAssetsRequestCallback);
+                        Util.FireAndForget(PerformAssetsRequestCallback);
-                        newThread.Name = "OpenSimulator archiving thread post assets receipt";
-                        newThread.Start();
                     }
                     else
                     {
@@ -265,7 +263,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         /// <summary>
         /// Perform the callback on the original requester of the assets
         /// </summary>
-        protected void PerformAssetsRequestCallback()
+        protected void PerformAssetsRequestCallback(object o)
         {
             try
             {

OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs

@@ -74,7 +74,6 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
         private Dictionary<ulong, int> m_blacklistedregions = new Dictionary<ulong, int>();
         private Dictionary<ulong, string> m_cachedRegionMapItemsAddress = new Dictionary<ulong, string>();
         private List<UUID> m_rootAgents = new List<UUID>();
-        private Thread mapItemReqThread;
         private volatile bool threadrunning = false;
 
         //private int CacheRegionsDistance = 256;
@@ -338,13 +337,10 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
         {
             if (threadrunning) return;
             threadrunning = true;
+
             m_log.Debug("[WORLD MAP]: Starting remote MapItem request thread");
-            mapItemReqThread = new Thread(new ThreadStart(process));
+
-            mapItemReqThread.IsBackground = true;
+            Watchdog.StartThread(process, "MapItemRequestThread", ThreadPriority.BelowNormal, true);
-            mapItemReqThread.Name = "MapItemRequestThread";
-            mapItemReqThread.Priority = ThreadPriority.BelowNormal;
-            mapItemReqThread.SetApartmentState(ApartmentState.MTA);
-            mapItemReqThread.Start();
         }
 
         /// <summary>
@@ -461,6 +457,8 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
                         OSDMap response = RequestMapItemsAsync("", st.agentID, st.flags, st.EstateID, st.godlike, st.itemtype, st.regionhandle);
                         RequestMapItemsCompleted(response);
                     }
+
+                    Watchdog.UpdateThread();
                 }
             }
             catch (Exception e)
@@ -469,6 +467,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
             }
 
             threadrunning = false;
+            Watchdog.RemoveThread();
         }
 
         /// <summary>

OpenSim/Region/Framework/Scenes/Scene.cs

@@ -81,8 +81,6 @@ namespace OpenSim.Region.Framework.Scenes
 
         protected Timer m_restartWaitTimer = new Timer();
 
-        protected Thread m_updateEntitiesThread;
-
         public SimStatsReporter StatsReporter;
 
         protected List<RegionInfo> m_regionRestartNotifyList = new List<RegionInfo>();
@@ -945,11 +943,8 @@ namespace OpenSim.Region.Framework.Scenes
                 HeartbeatThread = null;
             }
             m_lastUpdate = Environment.TickCount;
-            HeartbeatThread = new Thread(new ParameterizedThreadStart(Heartbeat));
+
-            HeartbeatThread.SetApartmentState(ApartmentState.MTA);
+            HeartbeatThread = Watchdog.StartThread(Heartbeat, "Heartbeat for region " + RegionInfo.RegionName, ThreadPriority.Normal, false);
-            HeartbeatThread.Name = string.Format("Heartbeat for region {0}", RegionInfo.RegionName);
-            HeartbeatThread.Priority = ThreadPriority.AboveNormal;
-            HeartbeatThread.Start();
         }
 
         /// <summary>
@@ -976,12 +971,13 @@ namespace OpenSim.Region.Framework.Scenes
         /// <summary>
         /// Performs per-frame updates regularly
         /// </summary>
-        /// <param name="sender"></param>
+        private void Heartbeat()
-        /// <param name="e"></param>
-        private void Heartbeat(object sender)
         {
             if (!Monitor.TryEnter(m_heartbeatLock))
+            {
+                Watchdog.RemoveThread();
                 return;
+            }
 
             try
             {
@@ -998,6 +994,8 @@ namespace OpenSim.Region.Framework.Scenes
                 Monitor.Pulse(m_heartbeatLock);
                 Monitor.Exit(m_heartbeatLock);
             }
+
+            Watchdog.RemoveThread();
         }
 
         /// <summary>
@@ -1146,6 +1144,8 @@ namespace OpenSim.Region.Framework.Scenes
 
                 if ((maintc < (m_timespan * 1000)) && maintc > 0)
                     Thread.Sleep(maintc);
+
+                Watchdog.UpdateThread();
             }
         }
 

OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs

@@ -67,9 +67,8 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
         {
             m_client = client;
             m_scene = scene;
-            
+
-            Thread loopThread = new Thread(InternalLoop);
+            Watchdog.StartThread(InternalLoop, "IRCClientView", ThreadPriority.Normal, false);
-            loopThread.Start();
         }
 
         private void SendServerCommand(string command)
@@ -102,7 +101,7 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
         {
             try
             {
-                string strbuf = "";
+                string strbuf = String.Empty;
 
                 while (m_connected && m_client.Connected)
                 {
@@ -140,6 +139,7 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
                     }
 
                     Thread.Sleep(0);
+                    Watchdog.UpdateThread();
                 }
             }
             catch (IOException)
@@ -156,6 +156,8 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
 
                 m_log.Warn("[IRCd] Disconnected client.");
             }
+
+            Watchdog.RemoveThread();
         }
 
         private void ProcessInMessage(string message, string command)

OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCServer.cs

@@ -33,6 +33,7 @@ using System.Reflection;
 using System.Text;
 using System.Threading;
 using log4net;
+using OpenSim.Framework;
 using OpenSim.Region.Framework.Scenes;
 
 namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
@@ -56,8 +57,7 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
 
             m_listener.Start(50);
 
-            Thread thread = new Thread(ListenLoop);
+            Watchdog.StartThread(ListenLoop, "IRCServer", ThreadPriority.Normal, false);
-            thread.Start();
             m_baseScene = baseScene;
         }
 
@@ -72,7 +72,10 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
             while (m_running)
             {
                 AcceptClient(m_listener.AcceptTcpClient());
+                Watchdog.UpdateThread();
             }
+
+            Watchdog.RemoveThread();
         }
 
         private void AcceptClient(TcpClient client)

OpenSim/Region/OptionalModules/ContentManagementSystem/CMController.cs

@@ -86,7 +86,6 @@ namespace OpenSim.Region.OptionalModules.ContentManagement
         /// </value>
         Hashtable m_sceneList = Hashtable.Synchronized(new Hashtable());
         State m_state = State.NONE;
-        Thread m_thread = null;
         CMView m_view = null;
 
         #endregion Fields
@@ -148,10 +147,7 @@ namespace OpenSim.Region.OptionalModules.ContentManagement
             lock (this)
             {
                 m_estateModule = scene.RequestModuleInterface<IEstateModule>();
-                m_thread = new Thread(MainLoop);
+                Watchdog.StartThread(MainLoop, "Content Management", ThreadPriority.Normal, true);
-                m_thread.Name = "Content Management";
-                m_thread.IsBackground = true;
-                m_thread.Start();
                 m_state = State.NONE;
             }
         }
@@ -200,6 +196,8 @@ namespace OpenSim.Region.OptionalModules.ContentManagement
                         m_log.Debug("[CONTENT MANAGEMENT] MAIN LOOP -- uuuuuuuuuh, what?");
                         break;
                     }
+
+                    Watchdog.UpdateThread();
                 }
             }
             catch (Exception e)
@@ -209,6 +207,8 @@ namespace OpenSim.Region.OptionalModules.ContentManagement
                     "[CONTENT MANAGEMENT]: Content management thread terminating with exception.  PLEASE REBOOT YOUR SIM - CONTENT MANAGEMENT WILL NOT BE AVAILABLE UNTIL YOU DO.  Exception is {0}", 
                     e);
             }
+
+            Watchdog.RemoveThread();
         }
 
         /// <summary>

OpenSim/Region/ScriptEngine/DotNetEngine/EventQueueThreadClass.cs

@@ -132,12 +132,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
         /// </summary>
         private void Start()
         {
-            EventQueueThread = new Thread(EventQueueThreadLoop);
+            EventQueueThread = Watchdog.StartThread(EventQueueThreadLoop, "EventQueueManagerThread_" + ThreadCount, MyThreadPriority, true);
-            EventQueueThread.IsBackground = true;
-
-            EventQueueThread.Priority = MyThreadPriority;
-            EventQueueThread.Name = "EventQueueManagerThread_" + ThreadCount;
-            EventQueueThread.Start();
 
             // Look at this... Don't you wish everyone did that solid
             // coding everywhere? :P
@@ -184,6 +179,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
                         while (true)
                         {
                             DoProcessQueue();
+                            Watchdog.UpdateThread();
                         }
                     }
                     catch (ThreadAbortException)
@@ -214,6 +210,8 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
                         m_log.ErrorFormat("[{0}]: Exception {1} thrown", ScriptEngineName, e.GetType().ToString());
                         throw e;
                     }
+
+                    Watchdog.UpdateThread();
                 }
             }
             catch (ThreadAbortException)
@@ -226,6 +224,8 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
                     "[{0}]: Event queue thread terminating with exception.  PLEASE REBOOT YOUR SIM - SCRIPT EVENTS WILL NOT WORK UNTIL YOU DO.  Exception is {1}", 
                     ScriptEngineName, e);
             }
+
+            Watchdog.RemoveThread();
         }
 
         public void DoProcessQueue()

OpenSim/Region/ScriptEngine/DotNetEngine/MaintenanceThread.cs

@@ -93,10 +93,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
         {
             if (MaintenanceThreadThread == null)
             {
-                MaintenanceThreadThread = new Thread(MaintenanceLoop);
+                MaintenanceThreadThread = Watchdog.StartThread(MaintenanceLoop, "ScriptMaintenanceThread", ThreadPriority.Normal, true);
-                MaintenanceThreadThread.Name = "ScriptMaintenanceThread";
-                MaintenanceThreadThread.IsBackground = true;
-                MaintenanceThreadThread.Start();
             }
         }
 
@@ -164,56 +161,54 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
                         MaintenanceLoopTicks_ScriptLoadUnload_Count++;
                         MaintenanceLoopTicks_Other_Count++;
 
-
+                        foreach (ScriptEngine m_ScriptEngine in new ArrayList(ScriptEngine.ScriptEngines))
-                        //lock (ScriptEngine.ScriptEngines)
+                        {
-                        //{
+                            // lastScriptEngine = m_ScriptEngine;
-                            foreach (ScriptEngine m_ScriptEngine in new ArrayList(ScriptEngine.ScriptEngines))
+                            // Re-reading config every x seconds
+                            if (MaintenanceLoopTicks_Other_Count >= MaintenanceLoopTicks_Other)
                             {
-                                // lastScriptEngine = m_ScriptEngine;
+                                MaintenanceLoopTicks_Other_ResetCount = true;
-                                // Re-reading config every x seconds
+                                if (m_ScriptEngine.RefreshConfigFilens > 0)
-                                if (MaintenanceLoopTicks_Other_Count >= MaintenanceLoopTicks_Other)
                                 {
-                                    MaintenanceLoopTicks_Other_ResetCount = true;
+                                    // Check if its time to re-read config
-                                    if (m_ScriptEngine.RefreshConfigFilens > 0)
+                                    if (DateTime.Now.Ticks - Last_ReReadConfigFilens >
+                                        m_ScriptEngine.RefreshConfigFilens)
                                     {
-                                        // Check if its time to re-read config
+                                        //m_log.Debug("Time passed: " + (DateTime.Now.Ticks - Last_ReReadConfigFilens) + ">" + m_ScriptEngine.RefreshConfigFilens);
-                                        if (DateTime.Now.Ticks - Last_ReReadConfigFilens >
+                                        // Its time to re-read config file
-                                            m_ScriptEngine.RefreshConfigFilens)
+                                        m_ScriptEngine.ReadConfig();
+                                        Last_ReReadConfigFilens = DateTime.Now.Ticks; // Reset time
+                                    }
+
+
+                                    // Adjust number of running script threads if not correct
+                                    if (m_ScriptEngine.m_EventQueueManager != null)
+                                        m_ScriptEngine.m_EventQueueManager.AdjustNumberOfScriptThreads();
+
+                                    // Check if any script has exceeded its max execution time
+                                    if (EventQueueManager.EnforceMaxExecutionTime)
+                                    {
+                                        // We are enforcing execution time
+                                        if (DateTime.Now.Ticks - Last_maxFunctionExecutionTimens >
+                                            EventQueueManager.maxFunctionExecutionTimens)
                                         {
-                                            //m_log.Debug("Time passed: " + (DateTime.Now.Ticks - Last_ReReadConfigFilens) + ">" + m_ScriptEngine.RefreshConfigFilens);
+                                            // Its time to check again
-                                            // Its time to re-read config file
+                                            m_ScriptEngine.m_EventQueueManager.CheckScriptMaxExecTime(); // Do check
-                                            m_ScriptEngine.ReadConfig();
+                                            Last_maxFunctionExecutionTimens = DateTime.Now.Ticks; // Reset time
-                                            Last_ReReadConfigFilens = DateTime.Now.Ticks; // Reset time
-                                        }
-
-
-                                        // Adjust number of running script threads if not correct
-                                        if (m_ScriptEngine.m_EventQueueManager != null)
-                                            m_ScriptEngine.m_EventQueueManager.AdjustNumberOfScriptThreads();
-
-                                        // Check if any script has exceeded its max execution time
-                                        if (EventQueueManager.EnforceMaxExecutionTime)
-                                        {
-                                            // We are enforcing execution time
-                                            if (DateTime.Now.Ticks - Last_maxFunctionExecutionTimens >
-                                                EventQueueManager.maxFunctionExecutionTimens)
-                                            {
-                                                // Its time to check again
-                                                m_ScriptEngine.m_EventQueueManager.CheckScriptMaxExecTime(); // Do check
-                                                Last_maxFunctionExecutionTimens = DateTime.Now.Ticks; // Reset time
-                                            }
                                         }
                                     }
                                 }
-                                if (MaintenanceLoopTicks_ScriptLoadUnload_Count >= MaintenanceLoopTicks_ScriptLoadUnload)
-                                {
-                                    MaintenanceLoopTicks_ScriptLoadUnload_ResetCount = true;
-                                    // LOAD / UNLOAD SCRIPTS
-                                    if (m_ScriptEngine.m_ScriptManager != null)
-                                        m_ScriptEngine.m_ScriptManager.DoScriptLoadUnload();
-                                }
                             }
-                        //}
+                            if (MaintenanceLoopTicks_ScriptLoadUnload_Count >= MaintenanceLoopTicks_ScriptLoadUnload)
+                            {
+                                MaintenanceLoopTicks_ScriptLoadUnload_ResetCount = true;
+                                // LOAD / UNLOAD SCRIPTS
+                                if (m_ScriptEngine.m_ScriptManager != null)
+                                    m_ScriptEngine.m_ScriptManager.DoScriptLoadUnload();
+                            }
+                        }
+
+                        Watchdog.UpdateThread();
                     }
                 }
                 catch(ThreadAbortException)
@@ -225,6 +220,8 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
                     m_log.ErrorFormat("Exception in MaintenanceLoopThread. Thread will recover after 5 sec throttle. Exception: {0}", ex.ToString());
                 }
             }
+
+            Watchdog.RemoveThread();
         }
         #endregion
 

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/AsyncCommandManager.cs

@@ -137,11 +137,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             if (cmdHandlerThread == null)
             {
                 // Start the thread that will be doing the work
-                cmdHandlerThread = new Thread(CmdHandlerThreadLoop);
+                cmdHandlerThread = Watchdog.StartThread(CmdHandlerThreadLoop, "AsyncLSLCmdHandlerThread", ThreadPriority.Normal, true);
-                cmdHandlerThread.Name = "AsyncLSLCmdHandlerThread";
-                cmdHandlerThread.Priority = ThreadPriority.BelowNormal;
-                cmdHandlerThread.IsBackground = true;
-                cmdHandlerThread.Start();
             }
         }
 
@@ -185,6 +181,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                         Thread.Sleep(cmdHandlerThreadCycleSleepms);
 
                         DoOneCmdHandlerPass();
+
+                        Watchdog.UpdateThread();
                     }
                 }
                 catch