diff -r c943ca4a3380 -r 39275d6a8cac jdk/src/java.base/share/classes/java/net/AbstractPlainDatagramSocketImpl.java
--- a/jdk/src/java.base/share/classes/java/net/AbstractPlainDatagramSocketImpl.java	Tue May 27 08:56:59 2014 -0400
+++ b/jdk/src/java.base/share/classes/java/net/AbstractPlainDatagramSocketImpl.java	Wed May 28 14:51:24 2014 +0100
@@ -68,6 +68,7 @@
                     return null;
                 }
             });
+        init();
     }
 
     /**
@@ -362,4 +363,7 @@
     protected boolean nativeConnectDisabled() {
         return connectDisabled;
     }
+
+    native int dataAvailable();
+    private static native void init();
 }