[jira] [Commented] (FLUME-2983) Handle offset migration in the new Kafka Source

["Mike Percy (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLUME-2983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15453996#comment-15453996 ] 

Mike Percy commented on FLUME-2983:
-----------------------------------

+1. I am about to commit this.

> Handle offset migration in the new Kafka Source
> -----------------------------------------------
>
>                 Key: FLUME-2983
>                 URL: https://issues.apache.org/jira/browse/FLUME-2983
>             Project: Flume
>          Issue Type: Bug
>    Affects Versions: v1.7.0
>            Reporter: Grant Henke
>            Assignee: Grant Henke
>
> Similar to FLUME-2972, Offsets tracking the position in Kafka consumers change from using zookeeper for offset storage to Kafka when moving from 0.8.x to 0.9.x.
> FLUME-2821 makes the client change in the Kafka Source but does not ensure existing offsets get migrated in order to continue consuming where it left off.
> Flume should have some automated logic on startup to check if Kafka offsets exist, if not and migration is enabled (by default) then copy the offsets from Zookeeper and commit them to Kafka.
> This change should also fix the backwards incompatibility caused by removing the zookeeperConnect property. The bootstrap can be looked up if zookeeperConnect is used. 



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