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https://issues.apache.org/jira/browse/KAFKA-6427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Manikumar resolved KAFKA-6427.
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Resolution: Fixed
Fix Version/s: 2.0.0
Fixed in https://github.com/apache/kafka/pull/5005
> Inconsistent exception type from KafkaConsumer.position
> -------------------------------------------------------
>
> Key: KAFKA-6427
> URL: https://issues.apache.org/jira/browse/KAFKA-6427
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Reporter: Jay Kahrman
> Priority: Trivial
> Fix For: 2.0.0
>
>
> If KafkaConsumer.position is called with a partition that the consumer isn't
> assigned, it throws an IllegalArgumentException. All other APIs throw an
> IllegalStateException when the consumer tries to act on a partition that is
> not assigned to the consumer.
> Looking at the implementation, if it weren't for subscription test and
> IllegalArgumentException thrown at the beginning of KafkaConsumer.position,
> the very next line would throw an IllegalStateException anyway.
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