update netty (#2787)

* update Netty to version 4.1.7

* tweak socket backlog

* update netty to version 4.1.11

frameworks/Java/netty/pom.xml

@@ -14,13 +14,13 @@
 		<dependency>
 			<groupId>io.netty</groupId>
 			<artifactId>netty-codec-http</artifactId>
-			<version>4.1.7.Final </version>
+			<version>4.1.11.Final </version>
 		</dependency>
 
 		<dependency>
 			<groupId>io.netty</groupId>
 			<artifactId>netty-transport-native-epoll</artifactId>
-			<version>4.1.7.Final </version>
+			<version>4.1.11.Final </version>
 			<classifier>linux-x86_64</classifier>
 		</dependency>
 

frameworks/Java/netty/src/main/java/hello/HelloWebServer.java

@@ -49,7 +49,7 @@ public class HelloWebServer {
 				b.option(EpollChannelOption.SO_REUSEPORT, true);
 			}
 
-			b.option(ChannelOption.SO_BACKLOG, 1024);
+			b.option(ChannelOption.SO_BACKLOG, 8192);
 			b.option(ChannelOption.SO_REUSEADDR, true);
 			b.group(loupGroup).channel(serverChannelClass).childHandler(new HelloServerInitializer(loupGroup.next()));
 			b.childOption(ChannelOption.ALLOCATOR, new PooledByteBufAllocator(true));