Github user mxm commented on the issue: https://github.com/apache/flink/pull/2425 Thank you for the changes. I wonder, could we remove the cookie header completely for Netty or the BlobServer in case the authorization is turned off? The Netty protocol has a `MAGIC_NUMBER` which is checked when decoding the message. We could use a different "magic number" to check whether we use the normal or the cookie-based Netty protocol. This would eliminate all the overhead of the cookie transmission. Furthermore, we should strip the cookie from the message once we have verified it is correct.
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