Fixes an issue which could cause CPU starvation while receiving from MultiplexingDatagramSocket.

src/org/jitsi/impl/neomedia/RTPConnectorUDPInputStream.java

@@ -21,15 +21,18 @@
 public class RTPConnectorUDPInputStream
     extends RTPConnectorInputStream
 {
+
     /**
-     * UDP socket used to receive data.
+     * The indicator which determine whether
+     * {@link DatagramSocket#setReceiveBufferSize(int)} has been invoked on
+     * {@link #socket}.
      */
-    private final DatagramSocket socket;
+    private boolean setReceiveBufferSize = false;
 
     /**
-     * Receive size configured flag.
+     * UDP socket used to receive data.
      */
-    private boolean receivedSizeFlag = false;
+    private final DatagramSocket socket;
 
     /**
      * Initializes a new <tt>RTPConnectorInputStream</tt> which is to receive
@@ -104,16 +107,17 @@ protected void doLogPacket(DatagramPacket p)
     protected void receivePacket(DatagramPacket p)
         throws IOException
     {
-        if(!receivedSizeFlag)
+        if (!setReceiveBufferSize)
         {
-            receivedSizeFlag = true;
-
+            setReceiveBufferSize = true;
             try
             {
                 socket.setReceiveBufferSize(65535);
             }
-            catch(Throwable t)
+            catch (Throwable t)
             {
+                if (t instanceof ThreadDeath)
+                    throw (ThreadDeath) t;
             }
         }
         socket.receive(p);

src/org/jitsi/impl/neomedia/transform/dtls/DatagramTransportImpl.java

@@ -302,6 +302,7 @@ public int receive(byte[] buf, int off, int len, int waitMillis)
         }
         if (interrupted)
             Thread.currentThread().interrupt();
+
         return received;
     }