I think you are hitting https://issues.apache.org/jira/browse/KAFKA-824. Was the consumer being shutdown at that time?
On Fri, Nov 1, 2013 at 1:28 AM, Kane Kane <kane.ist...@gmail.com> wrote: > I've got the following exception running produce/consume loop for several > hours, > that was just single exception, but during that time both producers and > consumers slowed down a lot. After that looks like everything works fine, > though i have > suspicion some messages were lost. > Can anyone explain what it might be? > > WARN consumer.ZookeeperConsumerConnector - > [group2_kafka-001.sendgrid.net-1383289 > 653031-b02bae92], exception during commitOffsets > java.lang.NullPointerException > at > org.I0Itec.zkclient.ZkConnection.writeDataReturnStat(ZkConnection.java:115) > at org.I0Itec.zkclient.ZkClient$10.call(ZkClient.java:817) > at > org.I0Itec.zkclient.ZkClient.retryUntilConnected(ZkClient.java:675) > at > org.I0Itec.zkclient.ZkClient.writeDataReturnStat(ZkClient.java:813) > at org.I0Itec.zkclient.ZkClient.writeData(ZkClient.java:808) > at org.I0Itec.zkclient.ZkClient.writeData(ZkClient.java:777) > at kafka.utils.ZkUtils$.updatePersistentPath(Unknown Source) > at > > kafka.consumer.ZookeeperConsumerConnector$$anonfun$commitOffsets$3$$anonfun$apply$5.apply(Unknown > Source) > at > > kafka.consumer.ZookeeperConsumerConnector$$anonfun$commitOffsets$3$$anonfun$apply$5.apply(Unknown > Source) > at scala.collection.Iterator$class.foreach(Iterator.scala:727) > at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) > at > scala.collection.IterableLike$class.foreach(IterableLike.scala:72) > at scala.collection.AbstractIterable.foreach(Iterable.scala:54) > at > > kafka.consumer.ZookeeperConsumerConnector$$anonfun$commitOffsets$3.apply(Unknown > Source) > at > > kafka.consumer.ZookeeperConsumerConnector$$anonfun$commitOffsets$3.apply(Unknown > Source) > at > > scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772) > at scala.collection.Iterator$class.foreach(Iterator.scala:727) > at kafka.utils.Pool$$anon$1.foreach(Unknown Source) > at > scala.collection.IterableLike$class.foreach(IterableLike.scala:72) > at kafka.utils.Pool.foreach(Unknown Source) > at > > scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771) > at kafka.consumer.ZookeeperConsumerConnector.commitOffsets(Unknown > Source) >
