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From "Neha Narkhede (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (KAFKA-1111) Broker prematurely accepts TopicMetadataRequests on startup
Date Fri, 01 Nov 2013 09:53:18 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-1111?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Neha Narkhede reassigned KAFKA-1111:
------------------------------------

    Assignee: Neha Narkhede

> Broker prematurely accepts TopicMetadataRequests on startup
> -----------------------------------------------------------
>
>                 Key: KAFKA-1111
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1111
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Jason Rosenberg
>            Assignee: Neha Narkhede
>
> I have an issue where on startup, the broker starts accepting TopicMetadataRequests before
it has had metadata sync'd from the controller.  This results in a bunch of log entries that
look like this:
> 013-11-01 03:26:01,577  INFO [kafka-request-handler-0] admin.AdminUtils$ - Topic creation
{ "partitions":{ "0":[ 9, 10 ] }, "version":1 }
> 2013-11-01 03:26:07,767  INFO [kafka-request-handler-1] admin.AdminUtils$ - Topic creation
{ "partitions":{ "0":[ 9, 11 ] }, "version":1 }
> 2013-11-01 03:26:07,823  INFO [kafka-request-handler-1] admin.AdminUtils$ - Topic creation
{ "partitions":{ "0":[ 10, 11 ] }, "version":1 }
> 2013-11-01 03:26:11,183  INFO [kafka-request-handler-2] admin.AdminUtils$ - Topic creation
{ "partitions":{ "0":[ 10, 11 ] }, "version":1 }
> From an email thread, Neha remarks:
> Before a broker receives the first
> LeaderAndIsrRequest/UpdateMetadataRequest, it is technically not ready to
> start serving any request. But it still ends up serving
> TopicMetadataRequest which can re-create topics accidentally. It shouldn't
> succeed, but this is still a problem.



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