aarti gupta created KAFKA-3007:
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             Summary: new Consumer should expose mechanism to fetch single 
message 
                 Key: KAFKA-3007
                 URL: https://issues.apache.org/jira/browse/KAFKA-3007
             Project: Kafka
          Issue Type: Improvement
          Components: consumer
    Affects Versions: 0.9.0.0
            Reporter: aarti gupta
            Assignee: Neha Narkhede


Currently, the consumer.poll(timeout)

returns all messages that have not been acked since the last fetch
The only way to process a single message, is to throw away all but the first 
message in the list
This would mean we are required to fetch all messages into memory, and this 
coupled with the client being not thread-safe, (i.e. we cannot use a different 
thread to ack messages, makes it hard to consume messages when the order of 
message arrival is important, and a large number of messages are pending to be 
consumed)



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