Fixed an infinite loop on a certain NIO impl

src/main/java/org/jboss/netty/channel/socket/nio/NioClientSocketPipelineSink.java

@@ -391,6 +391,7 @@ class NioClientSocketPipelineSink extends AbstractChannelSink {
             } catch (Throwable t) {
                 ch.connectFuture.setFailure(t);
                 fireExceptionCaught(ch, t);
+                k.cancel(); // Some JDK implementations run into an infinite loop without this.
                 ch.worker.close(ch, succeededFuture(ch));
             }
         }

src/main/java/org/jboss/netty/channel/socket/nio/NioDatagramWorker.java

@@ -424,6 +424,7 @@ class NioDatagramWorker implements Runnable {
         }
 
         if (failure) {
+            key.cancel(); // Some JDK implementations run into an infinite loop without this.
             close(channel, succeededFuture(channel));
             return false;
         }

src/main/java/org/jboss/netty/channel/socket/nio/NioWorker.java

@@ -353,6 +353,7 @@ class NioWorker implements Runnable {
         }
 
         if (ret < 0 || failure) {
+            k.cancel(); // Some JDK implementations run into an infinite loop without this.
             close(channel, succeededFuture(channel));
             return false;
         }