[jira] [Commented] (FLINK-3294) KafkaConsumer (0.8) commit offsets using SimpleConsumer.commitOffsets()

["Robert Metzger (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-3294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15119441#comment-15119441 ] 

Robert Metzger commented on FLINK-3294:
---------------------------------------

I hacked a first approach to this here: https://github.com/rmetzger/flink/tree/yangjun_fix
I'm not sure if I'm going to complete this any time soon.
If users are interested in this, please let me know (by writing a comment into the JIRA).

> KafkaConsumer (0.8) commit offsets using SimpleConsumer.commitOffsets()
> -----------------------------------------------------------------------
>
>                 Key: FLINK-3294
>                 URL: https://issues.apache.org/jira/browse/FLINK-3294
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>            Reporter: Robert Metzger
>
> Currently, the 0.8 consumer for Kafka is committing the offsets manually into Zookeeper so that users can track the lag using external tools.
> The 0.8 consumer has a pluggable design, and this component is easily pluggable.
> Since OffsetCommitRequest version=1 (supported in 0.8.2 or later), users can choose between two offset commit modes:
> a) Let the broker commit into ZK (this is  what we are doing from the consumer
> b) Let the broker commit the offset into a special topic.
> By adding a different "OffsetHandler" backend, users can commit offsets from the brokers (reducing the total number of ZK connections) or into the broker's offset topic.



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