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https://issues.apache.org/jira/browse/KAFKA-3129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15439764#comment-15439764
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Vahid Hashemian commented on KAFKA-3129:
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[~cotedm] Thanks for looking into this. I think if we are going to accept the
current behavior (which is fine to me) this defect should be documented and the
default ack (as you mentioned) should be set to something else other than 0 so
this issue is not revealed using default settings.
> Console producer issue when request-required-acks=0
> ---------------------------------------------------
>
> Key: KAFKA-3129
> URL: https://issues.apache.org/jira/browse/KAFKA-3129
> Project: Kafka
> Issue Type: Bug
> Components: producer
> Affects Versions: 0.9.0.0, 0.10.0.0
> Reporter: Vahid Hashemian
> Assignee: Neha Narkhede
> Attachments: kafka-3129.mov, server.log.abnormal.txt,
> server.log.normal.txt
>
>
> I have been running a simple test case in which I have a text file
> {{messages.txt}} with 1,000,000 lines (lines contain numbers from 1 to
> 1,000,000 in ascending order). I run the console consumer like this:
> {{$ bin/kafka-console-consumer.sh --zookeeper localhost:2181 --topic test}}
> Topic {{test}} is on 1 partition with a replication factor of 1.
> Then I run the console producer like this:
> {{$ bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test <
> messages.txt}}
> Then the console starts receiving the messages. And about half the times it
> goes all the way to 1,000,000. But, in other cases, it stops short, usually
> at 999,735.
> I tried running another console consumer on another machine and both
> consumers behave the same way. I can't see anything related to this in the
> logs.
> I also ran the same experiment with a similar file of 10,000 lines, and am
> getting a similar behavior. When the consumer does not receive all the 10,000
> messages it usually stops at 9,864.
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