That's right. If this only happens during shutdown, it's not a concern.

Thanks,

Jun


On Wed, Jul 10, 2013 at 10:28 PM, Philip O'Toole <phi...@loggly.com> wrote:

> Quite possibly. We are doing lots of restarts recovering from various
> issues.
> We can pay more attention next time.
>
> If it is a shutdown scenario, I guess we don't need to be that concerned?
>
> Philip
>
> On Jul 10, 2013, at 10:22 PM, Jun Rao <jun...@gmail.com> wrote:
>
> > That can happen when shutting down the consumer. Is that the case?
> >
> > Thanks,
> >
> > Jun
> >
> >
> > On Wed, Jul 10, 2013 at 6:43 PM, Philip O'Toole <phi...@loggly.com>
> wrote:
> >
> >> Hello -- we're doing some heavy lifting now with our high-level based
> >> consumer. We open a Consumer Connection per partition within the one
> JVM,
> >> and are using Kafka 0.72. We saw a burst of the exceptions shown below.
> Is
> >> this something we should be concerned about? Or is this the normal
> output
> >> from rebalancing, as the consumer starts up?
> >>
> >> Thanks,
> >>
> >> Philip
> >>
> >> 2013-07-10 23:39:37,012 [ERROR] [ZookeeperConsumerConnector.error]
> >> writer_writer0-1373499526097-ec0d4672 error during syncedRebalance
> >> java.lang.NullPointerException
> >>        at
> >> kafka.utils.ZkUtils$.getChildrenParentMayNotExist(ZkUtils.scala:181)
> >>        at kafka.utils.ZkUtils$.getCluster(ZkUtils.scala:202)
> >>        at
> >>
> >>
> kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anonfun$syncedRebalance$1.apply$mcVI$sp(ZookeeperConsumerConnector.scala:447)
> >>        at
> scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:75)
> >>        at
> >>
> >>
> kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener.syncedRebalance(ZookeeperConsumerConnector.scala:444)
> >>        at
> >>
> >>
> kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anon$1.run(ZookeeperConsumerConnector.scala:401)
> >> 2013-07-10 23:39:37,013 [INFO] [ZookeeperConsumerConnector.info]
> >> writer_writer0-1373499534602-35941a8c begin rebalancing consumer
> >> writer_writer0-1373499534602-35941a8c try #1
> >>
>

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