[GitHub] flink pull request #6071: [FLINK-3952][runtine] Upgrade to Netty 4.1

[zentol]

Github user zentol commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6071#discussion_r191385215
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/buffer/ReadOnlySlicedNetworkBuffer.java
 ---
    @@ -75,12 +75,12 @@ private ReadOnlySlicedNetworkBuffer(ByteBuf buffer, int 
index, int length, int m
     
        @Override
        public ByteBuf unwrap() {
    -           return super.unwrap().unwrap();
    +           return super.unwrap();
    --- End diff --
    
    Is this change necessary for the upgrade or cleanup?


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