Github user zjureel commented on a diff in the pull request: https://github.com/apache/flink/pull/4562#discussion_r134704354 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyMessage.java --- @@ -220,9 +220,7 @@ void releaseBuffer() { @Override ByteBuf write(ByteBufAllocator allocator) throws IOException { - if (null == buffer) { - throw new NullPointerException(); - } + Preconditions.checkNotNull(buffer, "When deserializing the buffer should have to be requested first."); --- End diff -- Great, thank you for your suggestion :)
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