quickfix for TooTallNate#168

Author: Davidiusdadi

src/main/java/org/java_websocket/WebSocketImpl.java

@@ -465,7 +465,7 @@ protected synchronized void closeConnection( int code, String message, boolean r
 		handshakerequest = null;
 
 		readystate = READYSTATE.CLOSED;
-
+		this.outQueue.clear();
 	}
 
 	protected void closeConnection( int code, boolean remote ) {

src/main/java/org/java_websocket/server/WebSocketServer.java

@@ -529,7 +529,12 @@ public final void onWebsocketError( WebSocket conn, Exception ex ) {
 	@Override
 	public final void onWriteDemand( WebSocket w ) {
 		WebSocketImpl conn = (WebSocketImpl) w;
-		conn.key.interestOps( SelectionKey.OP_READ | SelectionKey.OP_WRITE );
+		try {
+			conn.key.interestOps( SelectionKey.OP_READ | SelectionKey.OP_WRITE );
+		} catch ( CancelledKeyException e ) {
+			// the thread which cancels key is responsible for possible cleanup
+			conn.outQueue.clear();
+		}
 		selector.wakeup();
 	}