Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5007#discussion_r150615019
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyMessage.java
---
@@ -52,8 +52,10 @@
/**
* A simple and generic interface to serialize messages to Netty's buffer
space.
+ *
+ * <p>This class must be public as long as we are using Netty 4.0.x.
Please check FLINK-7845 for more information.
--- End diff --
actually, Netty 4.0.45 seemed to fix this already
---
