<groupId>io.netty</groupId>
<artifactId>netty-transport</artifactId>
</dependency>
+ <dependency>
+ <groupId>io.netty</groupId>
+ <artifactId>netty-buffer</artifactId>
+ </dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-common</artifactId>