GitHub user amethystic reopened a pull request: https://github.com/apache/kafka/pull/2054
kafka-4295: ConsoleConsumer does not delete the temporary group in zookeeper Since consumer stop logic and zk node removal code are in separate threads, so when two threads execute in an interleaving manner, persistent node '/consumers/' might not be removed for those console consumer groups which do not specify "group.id". This will pollute Zookeeper with lots of inactive console consumer offset information. You can merge this pull request into a Git repository by running: $ git pull https://github.com/amethystic/kafka kafka-4295_ConsoleConsumer_fail_to_remove_zknode_onexit Alternatively you can review and apply these changes as the patch at: https://github.com/apache/kafka/pull/2054.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 #2054 ---- commit 872441963c67d3ec57c18690bef14ef5afbfb45a Author: huxi <h...@zhenrongbao.com> Date: 2016-10-22T12:41:42Z kafka-4295: kafka-console-consumer.sh does not delete the temporary group in zookeeper Author: huxi Since consumer stop logic and zk node removal code are in separate threads, so when two threads execute in an interleaving manner, persistent node '/consumers/<consumer-group>' might not be removed for those console consumer groups which do not specify "group.id". This will pollute Zookeeper with lots of inactive console consumer offset information. ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---