[jira] [Resolved] (KAFKA-1919) Metadata request issued with no backoff in new producer if there are no topics

["Jay Kreps (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-1919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jay Kreps resolved KAFKA-1919.
------------------------------
    Resolution: Fixed

Double committed against trunk and 0.8.2

> Metadata request issued with no backoff in new producer if there are no topics
> ------------------------------------------------------------------------------
>
>                 Key: KAFKA-1919
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1919
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8.2.0
>            Reporter: Jay Kreps
>            Priority: Blocker
>             Fix For: 0.8.2.1
>
>         Attachments: KAFKA-1919-v1.patch
>
>
> Original report:
> We have observed high cpu and high network traffic problem when
> 1) cluster (0.8.1.1) has no topic
> 2) KafkaProducer (0.8.2-beta) object is created without sending any traffic
> We have observed such problem twice. In both cases, problem went away
> immediately after one/any topic is created.
> Is this a known issue? Just want to check with the community first before I
> spend much time to reproduce it.
> I couldn't reproduce the issue with similar setup with unit test code in
> IDE. start two brokers with no topic locally on my laptop. create a
> KafkaProducer object without sending any msgs. but I only tested with
> 0.8.2-beta for both broker and producer.
> Issue exists in 0.8.2 as well:
> I have re-run my unit test with 0.8.2.0. same tight-loop problem happened
> after a few mins.



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