Hi Swapnil, I have done exactly this (killed and wiped everything), and have found that my custom formatter based ConsoleConsumer fails:
[2013-02-27 12:34:31,420] ERROR Error processing message, stopping consumer: (kafka.consumer.ConsoleConsumer$) java.lang.NumberFormatException: For input string: ""192.168.2.132", "jmx_port"" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:449) at java.lang.Integer.parseInt(Integer.java:499) at scala.collection.immutable.StringLike$class.toInt(StringLike.scala:207) at scala.collection.immutable.StringOps.toInt(StringOps.scala:31) at kafka.cluster.Broker$.createBroker(Broker.scala:34) at kafka.utils.ZkUtils$$anonfun$getCluster$1.apply(ZkUtils.scala:450) at kafka.utils.ZkUtils$$anonfun$getCluster$1.apply(ZkUtils.scala:448) at scala.collection.Iterator$class.foreach(Iterator.scala:631) at scala.collection.JavaConversions$JIteratorWrapper.foreach(JavaConversions.scala:474) at scala.collection.IterableLike$class.foreach(IterableLike.scala:79) at scala.collection.JavaConversions$JListWrapper.foreach(JavaConversions.scala:521) at kafka.utils.ZkUtils$.getCluster(ZkUtils.scala:448) at kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anonfun$syncedRebalance$1.apply$mcVI$sp(ZookeeperConsumerConnector.scala:371) at scala.collection.immutable.Range$ByOne$class.foreach$mVc$sp(Range.scala:282) at scala.collection.immutable.Range$$anon$2.foreach$mVc$sp(Range.scala:265) at kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener.syncedRebalance(ZookeeperConsumerConnector.scala:368) at kafka.consumer.ZookeeperConsumerConnector.kafka$consumer$ZookeeperConsumerConnector$$reinitializeConsumer(ZookeeperConsumerConnector.scala:697) at kafka.consumer.ZookeeperConsumerConnector$WildcardStreamsHandler.<init>(ZookeeperConsumerConnector.scala:732) at kafka.consumer.ZookeeperConsumerConnector.createMessageStreamsByFilter(ZookeeperConsumerConnector.scala:141) at kafka.consumer.ConsoleConsumer$.main(ConsoleConsumer.scala:183) at kafka.consumer.ConsoleConsumer.main(ConsoleConsumer.scala) I haven't tracked down why the mismatch only occurs with my formatter, but advice is appreciated. ben