GitHub user StephanEwen opened a pull request: https://github.com/apache/flink/pull/2559
[FLINK-4702] [kafka connector] Commit offets to Kafka asynchronously The offset commit calls to Kafka may occasionally take very long. In that case, the notifyCheckpointComplete() method blocks for long and the KafkaConsumer cannot make progress and cannot perform checkpoints. This pull request changes the offset committing to use Kafka's `commitAsync()` method. It also makes sure that no more than one commit is concurrently in progress, to that commit requests do not pile up. You can merge this pull request into a Git repository by running: $ git pull https://github.com/StephanEwen/incubator-flink kafka_commit_async Alternatively you can review and apply these changes as the patch at: https://github.com/apache/flink/pull/2559.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 #2559 ---- commit eafba8600863c18e09397366485bcfc6ff44960f Author: Stephan Ewen <se...@apache.org> Date: 2016-09-27T18:59:35Z [FLINK-4702] [kafka connector] Commit offets to Kafka asynchronously ---- --- 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. ---