[jira] [Resolved] (FLINK-4702) Kafka consumer must commit offsets asynchronously

["Stephan Ewen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-4702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen resolved FLINK-4702.
---------------------------------
    Resolution: Fixed

Fixed in
  - 1.2.0 via 92f4539afc714f7dbd293c3ad677b3b5807c6911
  - 1.1.3 via 90d77594fffda1d8d15658d363c478ea6430514e

> Kafka consumer must commit offsets asynchronously
> -------------------------------------------------
>
>                 Key: FLINK-4702
>                 URL: https://issues.apache.org/jira/browse/FLINK-4702
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>    Affects Versions: 1.1.2
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>            Priority: Blocker
>             Fix For: 1.2.0, 1.1.3
>
>
> 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.
> Kafka 0.9+ have methods to commit asynchronously.
> We should use those and make sure no more than one commit is concurrently in progress, to that commit requests do not pile up.



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