<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
+ <dependency>
+ <groupId>io.netty</groupId>
+ <artifactId>netty-buffer</artifactId>
+ <version>${netty.version}</version>
+ </dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-handler</artifactId>