GitHub user edoardocomar opened a pull request:
https://github.com/apache/kafka/pull/1934
KAFKA-4206 Improve handling of invalid credentials to mitigate DOS issue
Delay closing channels for connections where a SALException has been
thrown.
This PR is a proof of concept and would like to stimulate feedback.
This same approach has been used successfully in IBM MessageHub and
**proved** capable of reducing dramatically the impact of SSL connections with
wrong SASL credentials.
Without this patch, a lot of cpu time is dedicated to SSL handshakes, many
network threads are busy and the overall latencies suffer for already
authenticated clients.
this PR has been codeveloped with @mimaison
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/edoardocomar/kafka KAFKA-4206
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/1934.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1934
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commit ee21cc5e09a4f8cd4fbd42689d85907f16ee204a
Author: Edoardo Comar <eco...@uk.ibm.com>
Date: 2016-09-29T16:16:40Z
KAFKA-4206 Improve handling of invalid credentials to mitigate DOS issue
Delay closing channels for connections where a SALException has been
thrown
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