Index: C:/workspace/L2_GameServer/java/net/sf/l2j/gameserver/SelectorThread.java
===================================================================
--- C:/workspace/L2_GameServer/java/net/sf/l2j/gameserver/SelectorThread.java	(revision 1718)
+++ C:/workspace/L2_GameServer/java/net/sf/l2j/gameserver/SelectorThread.java	(working copy)
@@ -73,9 +73,6 @@
  */
 public final class SelectorThread extends Thread {
 	private static Logger _log = Logger.getLogger(SelectorThread.class.getName());
-	private final int SELECT_TIME_MARGIN=20; // decrease of false network stalls reported
-											 // increase if you still get mass disconnects
-											 // max = 100
 	
 	public static SelectorThread instance;
 	
@@ -248,10 +245,7 @@
 				// wait for read/write, timeout is to be on safe side,
 				// if waking up selector after a message push will fail
                 // this is needed because we are in an infinite loop
-				long start=System.currentTimeMillis();
 				int numKeys = _selector.select(50L);
-                long selector_time=System.currentTimeMillis()-start;
-                 
                 
 				// check for shutdown
 				if (isInterrupted())
@@ -259,15 +253,14 @@
 					try { _selector.close(); } catch (Throwable t) { _log.log(Level.INFO, "", t); }
 					return;
 				}
-
-				Iterator<SelectionKey> it = _selector.selectedKeys().iterator();	
 				
-				if (numKeys==0 && selector_time<SELECT_TIME_MARGIN && !it.hasNext())
+				if (numKeys==0 && _selector.selectedKeys().size()==0)
 				{
 					sleep(50); // sleep some time to prevent thread from eating all cpu time
-					continue;  // only continue if we don't have any keys to remove
+					continue;  // only continue if we don't have any keys to process
 				} 
-
+				
+				Iterator<SelectionKey> it = _selector.selectedKeys().iterator();	
 				// iterate over selected keys
 				while (it.hasNext())
 				{
@@ -567,7 +560,10 @@
 		if (msgCounter > 20 || msg instanceof LeaveWorld) {
 			_selector.wakeup();
 			if (msgCounter > 1000)
-				this.setPriority(Thread.NORM_PRIORITY+1); // up
+			{
+				_log.warning("SelectorThread: msgCounter="+msgCounter);
+				this.setPriority(Thread.NORM_PRIORITY+2); // up
+			}
 		}
 	}
 	
@@ -628,7 +624,10 @@
 			} catch (IOException e) {
 				r = -1;
 			}
-			if (r < 0 || !sk.isValid()) {
+
+			if(!sk.isValid() && r>=0) _log.warning("mass disc fix: sk.isValid()==false,  this would close client connection with data_written="+r);
+
+			if (r < 0 ) {             //|| !sk.isValid()) {
 				closeClient(con);
 				return;
 			}
@@ -639,7 +638,11 @@
 				b.flip();
 				con.writeBuffer = b;
 				con.writeTimeStamp = GameTimeController.getGameTicks();
-				sk.interestOps(sk.interestOps() | SelectionKey.OP_WRITE);
+				if(sk.isValid()) sk.interestOps(sk.interestOps() | SelectionKey.OP_WRITE); 
+				else
+				{
+					return;	// selection key invalit, what should we do ?  just return ?
+				}
 			}
 			else
 			{