Apurva Mehta created KAFKA-5349:
-----------------------------------

             Summary: KafkaConsumer occasionally hits IllegalStateException
                 Key: KAFKA-5349
                 URL: https://issues.apache.org/jira/browse/KAFKA-5349
             Project: Kafka
          Issue Type: Bug
            Reporter: Apurva Mehta


I have noticed the following while debugging system tests. Sometimes a plain 
old console consumer hits the following exception when reading from a topic:

{noformat}
[2017-05-30 22:16:55,686] ERROR Unknown error when running consumer:  
(kafka.tools.ConsoleConsumer$)
java.lang.IllegalStateException: Invalid attempt to complete a request future 
which is already complete
        at 
org.apache.kafka.clients.consumer.internals.RequestFuture.raise(RequestFuture.java:145)
        at 
org.apache.kafka.clients.consumer.internals.RequestFuture.raise(RequestFuture.java:158)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher.handleListOffsetResponse(Fetcher.java:744)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher.access$2000(Fetcher.java:91)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher$3.onSuccess(Fetcher.java:688)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher$3.onSuccess(Fetcher.java:683)
        at 
org.apache.kafka.clients.consumer.internals.RequestFuture$1.onSuccess(RequestFuture.java:204)
        at 
org.apache.kafka.clients.consumer.internals.RequestFuture.fireSuccess(RequestFuture.java:167)
        at 
org.apache.kafka.clients.consumer.internals.RequestFuture.complete(RequestFuture.java:127)
        at 
org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler.fireCompletion(ConsumerNetworkClient.java:488)
        at 
org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.firePendingCompletedRequests(ConsumerNetworkClient.java:348)
        at 
org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:262)
        at 
org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:208)
        at 
org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:184)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher.retrieveOffsetsByTimes(Fetcher.java:451)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher.resetOffsets(Fetcher.java:409)
        at 
org.apache.kafka.clients.consumer.internals.Fetcher.updateFetchPositions(Fetcher.java:282)
        at 
org.apache.kafka.clients.consumer.KafkaConsumer.updateFetchPositions(KafkaConsumer.java:1614)
        at 
org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1055)
        at 
org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1015)
        at kafka.consumer.NewShinyConsumer.<init>(BaseConsumer.scala:58)
        at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:72)
        at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:53)
        at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)

{noformat}



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