Thanks Neha,There is another exception, but it happened just one time. It like 
below:
java.lang.NullPointerException        at 
kafka.utils.ZkUtils$.getChildrenParentMayNotExist(ZkUtils.scala:181)        at 
kafka.utils.ZkUtils$.getCluster(ZkUtils.scala:202)        at 
kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anonfun$syncedRebalance$1.apply$mcVI$sp(ZookeeperConsumerConnector.scala:447)
        at 
scala.collection.immutable.Range$ByOne$class.foreach$mVc$sp(Range.scala:282)    
    at scala.collection.immutable.Range$$anon$2.foreach$mVc$sp(Range.scala:265) 
       at 
kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener.syncedRebalance(ZookeeperConsumerConnector.scala:444)
        at 
kafka.consumer.ZookeeperConsumerConnector.kafka$consumer$ZookeeperConsumerConnector$$reinitializeConsumer(ZookeeperConsumerConnector.scala:733)
        at 
kafka.consumer.ZookeeperConsumerConnector.consume(ZookeeperConsumerConnector.scala:207)
        at 
kafka.javaapi.consumer.ZookeeperConsumerConnector.createMessageStreams(ZookeeperConsumerConnector.scala:77)
        at 
kafka.javaapi.consumer.ZookeeperConsumerConnector.createMessageStreams(ZookeeperConsumerConnector.scala:91)
        at 
bfd.kafkaconsumerclient.ConsumerInstance.Init(ConsumerInstance.java:167)        
at bfd.kafkaconsumerclient.ConsumerInstance.getArray(ConsumerInstance.java:275) 

But the exception "java.lang.IllegalStateException: Iterator is in failed 
state"  happened frequently. And there are a lot of this exceptions in short 
time. I use client to consume some topics that are not exist on zk. Does that 
has relation to the exception?Thanks.
----- Original Message -----
From: Neha Narkhede <neha.narkh...@gmail.com>
To: kafka-users@incubator.apache.org, zlai_2...@sina.com
Subject: Re: an exception in the logfile of consumer client
Date: 2012-07-19 01:09

I suspect the consumer logs should have some other exception too. Could you 
send around the entire consumer log as well as the consumer code snippet ? 
Also, do you have a test case ? 

Thanks,
Neha


On Wed, Jul 18, 2012 at 4:27 AM,  <zlai_2...@sina.com> wrote:

 Hi all,

        I use the kafka-0.7.1. But I find an exception in the logfile of 
consumer client. I want to know how does it happen? How to solve it? Thanks.The 
exception is like:

java.lang.IllegalStateException: Iterator is in failed state

        at kafka.utils.IteratorTemplate.hasNext(IteratorTemplate.scala:47)

        at 
bfd.kafkaconsumerclient.ConsumerInstance.getArray(ConsumerInstance.java:273)

        at 
bfd.kafkaconsumerclient.KafkaConsumerClientManagerI.getArray(KafkaConsumerClientManagerI.java:279)

        at 
bfd.kafkaconsumerclient._KafkaConsumerClientManagerDisp.___getArray(_KafkaConsumerClientManagerDisp.java:324)

        at 
bfd.kafkaconsumerclient._KafkaConsumerClientManagerDisp.__dispatch(_KafkaConsumerClientManagerDisp.java:594)

        at IceInternal.Incoming.invoke(Incoming.java:159)

        at Ice.ConnectionI.invokeAll(ConnectionI.java:2037)

        at Ice.ConnectionI.message(ConnectionI.java:972)

        at IceInternal.ThreadPool.run(ThreadPool.java:577)

        at IceInternal.ThreadPool.access$100(ThreadPool.java:12)

        at IceInternal.ThreadPool$EventHandlerThread.run(ThreadPool.java:971)   


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