[jira] [Resolved] (KAFKA-5505) Connect: Do not restart connector and existing tasks on task-set change

["Randall Hauch (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-5505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Randall Hauch resolved KAFKA-5505.
----------------------------------
    Resolution: Fixed
      Reviewer: Randall Hauch

> Connect: Do not restart connector and existing tasks on task-set change
> -----------------------------------------------------------------------
>
>                 Key: KAFKA-5505
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5505
>             Project: Kafka
>          Issue Type: Improvement
>          Components: KafkaConnect
>    Affects Versions: 0.10.2.1
>            Reporter: Per Steffensen
>            Assignee: Konstantine Karantasis
>            Priority: Major
>             Fix For: 2.3.0
>
>
> I am writing a connector with a frequently changing task-set. It is really not working very well, because the connector and all existing tasks are restarted when the set of tasks changes. E.g. if the connector is running with 10 tasks, and an additional task is needed, the connector itself and all 10 existing tasks are restarted, just to make the 11th task run also. My tasks have a fairly heavy initialization, making it extra annoying. I would like to see a change, introducing a "mode", where only new/deleted tasks are started/stopped when notifying the system that the set of tasks changed (calling context.requestTaskReconfiguration() - or something similar).
> Discussed this issue a little on dev@kafka.apache.org in the thread "Kafka Connect: To much restarting with a SourceConnector with dynamic set of tasks"



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