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https://issues.apache.org/jira/browse/KAFKA-3800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15319913#comment-15319913
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Ewen Cheslack-Postava commented on KAFKA-3800:
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[~frank_zg] Can you provide more details about your code, what consumer 
configuration you're using, etc? What part of the message is null? Is this the 
new or old consumer? Did you use auto.offset.reset=earliest? If not, only new 
messages will be returned to the consumer.

> java client can`t poll msg
> --------------------------
>
>                 Key: KAFKA-3800
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3800
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer
>    Affects Versions: 0.9.0.1
>         Environment: java8,win7 64
>            Reporter: frank
>            Assignee: Neha Narkhede
>
> i use hump topic name, after poll msg is null.eg: Test_4 why?
> all low char is ok. i`m try nodejs,kafka-console-consumers.bat is ok



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