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https://issues.apache.org/jira/browse/KAFKA-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismael Juma resolved KAFKA-2662.
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Resolution: Auto Closed
The Scala consumers are no longer supported. Please upgrade to the Java
consumer whenever possible.
> Make ConsumerIterator thread-safe for multiple threads in different Kafka
> groups
> --------------------------------------------------------------------------------
>
> Key: KAFKA-2662
> URL: https://issues.apache.org/jira/browse/KAFKA-2662
> Project: Kafka
> Issue Type: Improvement
> Components: consumer
> Affects Versions: 0.8.2.1
> Reporter: Andrew Pennebaker
> Assignee: Neha Narkhede
>
> The API for obtaining a ConsumerIterator requires a group parameter, implying
> that ConsumerIterators are thread-safe, as long as each thread is in a
> different Kafka group. However, in practice, attempting to call hasNext() on
> ConsumerIterators for a thread in one group, and for a thread in another
> group, results in an InvalidStateException.
> In the future, can we please make ConsumerIterator thread-safe, for a common
> use case of one consumer thread per group?
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