[jira] [Created] (KAFKA-3044) Consumer.poll doesnot return messages when poll interval is less

["Praveen Devarao (JIRA)" <ji...@apache.org>]

Praveen Devarao created KAFKA-3044:
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             Summary: Consumer.poll doesnot return messages when poll interval is less
                 Key: KAFKA-3044
                 URL: https://issues.apache.org/jira/browse/KAFKA-3044
             Project: Kafka
          Issue Type: Bug
          Components: clients
    Affects Versions: 0.9.0.0
            Reporter: Praveen Devarao
             Fix For: 0.9.0.1


When seeking to particular position in consumer and starting poll with timeout param 0 the consumer does not come back with data though there is data published via a producer already. If the timeout is increased slowly in chunks of 100ms then at 700ms value the consumer returns back the record on first call to poll.

Docs [http://kafka.apache.org/090/javadoc/org/apache/kafka/clients/consumer/KafkaConsumer.html#poll(long)] for poll reads if timeout is 0 then data will be returned immediately but the behaviour seen is that data is not returned.

The test code I am using can be found here https://gist.github.com/praveend/013dcab01ebb8c7e2f2d

I have created a topic with data published as below and then running the test program [ConsumerPollTest.java]

$ bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic mytopic
$ bin/kafka-console-producer.sh --broker-list localhost:9092 --topic mytopic
Hello
Hai
bye
$ java ConsumerPollTest

I have published this 3 lines of data to kafka only once....later on I just use the above program with different poll interval

Let me know if I am missing anything and interpreting it wrongly.



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