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From Jun Rao <...@confluent.io>
Subject [ANNOUNCE] New committer: Onur Karaman
Date Mon, 06 Nov 2017 17:24:39 GMT
Hi, everyone,

The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
Karaman.

Onur's most significant work is the improvement of Kafka controller, which
is the brain of a Kafka cluster. Over time, we have accumulated quite a few
correctness and performance issues in the controller. There have been
attempts to fix controller issues in isolation, which would make the code
base more complicated without a clear path of solving all problems. Onur is
the one who took a holistic approach, by first documenting all known
issues, writing down a new design, coming up with a plan to deliver the
changes in phases and executing on it. At this point, Onur has completed
the two most important phases: making the controller single threaded and
changing the controller to use the async ZK api. The former fixed multiple
deadlocks and race conditions. The latter significantly improved the
performance when there are many partitions. Experimental results show that
Onur's work reduced the controlled shutdown time by a factor of 100 times
and the controller failover time by a factor of 3 times.

Congratulations, Onur!

Thanks,

Jun (on behalf of the Apache Kafka PMC)

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