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)
