Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2425
The Netty logic needs some improvements:
- The cookie is added to every single message/buffer that is transferred.
That is too much - securing the integrity of the stream is responsibility of
the encryption layer. The cookie should be added to requests messages that
establish connections only.
- Charset lookups and cookie to bytes encoding happens for every buffer,
rather than once in an initialization step.
- The String to byte conversion is not consistent. Sometimes it uses the
default platform encoding, sometimes "UTF-8".
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