[jira] [Created] (FLINK-3952) Bump Netty to 4.1

[Shang Yuanchun (Jira)]

rektide de la fey created FLINK-3952:
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             Summary: Bump Netty to 4.1
                 Key: FLINK-3952
                 URL: https://issues.apache.org/jira/browse/FLINK-3952
             Project: Flink
          Issue Type: Improvement
          Components: Core, Hadoop Compatibility
            Reporter: rektide de la fey


Netty 4.1 is about to release final. This release has [a number of significant enhancements|http://netty.io/wiki/new-and-noteworthy-in-4.1.html], and in particular I find HTTP/2 codecs to be incredibly desirable to have.

Additionally, hopefully, the [Hadoop patches for Netty 4.1](https://issues.apache.org/jira/browse/HADOOP-11716) get some tests and get merged, & I believe if/when that happens it'll be important for Flink to also be using the new Netty minor version.



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