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Re: consumer null pointer exception
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 <[EMAIL PROTECTED]> 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)
>