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https://issues.apache.org/jira/browse/KAFKA-2342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14637525#comment-14637525
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ASF GitHub Bot commented on KAFKA-2342:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/88
> KafkaConsumer rebalance with in-flight fetch can cause invalid position
> -----------------------------------------------------------------------
>
> Key: KAFKA-2342
> URL: https://issues.apache.org/jira/browse/KAFKA-2342
> Project: Kafka
> Issue Type: Sub-task
> Components: core
> Affects Versions: 0.8.3
> Reporter: Jun Rao
> Assignee: Jason Gustafson
> Fix For: 0.9.0
>
>
> If a rebalance occurs with an in-flight fetch, the new KafkaConsumer can end
> up updating the fetch position of a partition to an offset which is no longer
> valid. The consequence is that we may end up either returning to the user
> messages with an unexpected position or we may fail to give back the right
> offset in position().
> Additionally, this bug causes transient test failures in
> ConsumerBounceTest.testConsumptionWithBrokerFailures with the following
> exception:
> kafka.api.ConsumerBounceTest > testConsumptionWithBrokerFailures FAILED
> java.lang.NullPointerException
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.position(KafkaConsumer.java:949)
> at
> kafka.api.ConsumerBounceTest.consumeWithBrokerFailures(ConsumerBounceTest.scala:86)
> at
> kafka.api.ConsumerBounceTest.testConsumptionWithBrokerFailures(ConsumerBounceTest.scala:61)
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