Netty IO Channel No Such Method Error

If you are facing the below error out of nowhere (generally when you update your dependency versions or add a new dependency) then it is mostly the result of multiple versions of “io.netty.channel”.

java.lang.NoSuchMethodError: 'io.netty.channel.DefaultChannelId io.netty.channel.DefaultChannelId.newInstance()'

This can be easily fixed by adding an exclusion on the new or updated dependency to not include “netty-nio-client” which I did for the AWS SDK in maven.

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>sqs</artifactId>
    <exclusions>
        <exclusion>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>netty-nio-client</artifactId>
        </exclusion>
    </exclusions>
</dependency>

I faced this issue when adding AWS SDK to an old Scala service.