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Posted to dev@kafka.apache.org by "Boyang Chen (JIRA)" <ji...@apache.org> on 2019/04/25 23:55:00 UTC

[jira] [Resolved] (KAFKA-8287) JVM global map to fence duplicate client id

     [ https://issues.apache.org/jira/browse/KAFKA-8287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Boyang Chen resolved KAFKA-8287.
--------------------------------
    Resolution: Invalid

We don't want to do it for now because there are existing use cases where `client.id` is expected to be duplicate across different stream instances for request throttling purpose.

> JVM global map to fence duplicate client id
> -------------------------------------------
>
>                 Key: KAFKA-8287
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8287
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: streams
>            Reporter: Boyang Chen
>            Assignee: Boyang Chen
>            Priority: Major
>
> After change in https://issues.apache.org/jira/browse/KAFKA-8285, the two stream instances scheduled on same JVM will be mutually affected if they accidentally assign same client.id, since the thread-id becomes local now. The solution is to build a global concurrent map for solving conflict if two threads happen to be having the same client.id.



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