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https://issues.apache.org/jira/browse/KAFKA-1272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jun Rao resolved KAFKA-1272.
----------------------------
Resolution: Duplicate
> controller logs exceptions during ZK session expiration
> -------------------------------------------------------
>
> Key: KAFKA-1272
> URL: https://issues.apache.org/jira/browse/KAFKA-1272
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.8.1
> Reporter: Jun Rao
> Assignee: Jun Rao
>
> Saw the following issues when there is ZK session expiration in the
> controller.
> 1.
> ERROR Error handling event ZkEvent[Children of
> /admin/delete_topics changed sent to
> kafka.controller.PartitionStateMachine$DeleteTopicsListener@39abdac9]
> (org.I0Itec.zkclient.ZkEventThread)
> java.lang.NullPointerException
> at
> scala.collection.JavaConversions$JListWrapper.iterator(JavaConversions.scala:524)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:79)
> at
> scala.collection.JavaConversions$JListWrapper.foreach(JavaConversions.scala:521)
> at
> scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:176)
> at
> scala.collection.JavaConversions$JListWrapper.foldLeft(JavaConversions.scala:521)
> at
> scala.collection.TraversableOnce$class.$div$colon(TraversableOnce.scala:139)
> at
> scala.collection.JavaConversions$JListWrapper.$div$colon(JavaConversions.scala:521)
> at scala.collection.generic.Addable$class.$plus$plus(Addable.scala:54)
> at scala.collection.immutable.Set$EmptySet$.$plus$plus(Set.scala:47)
> at scala.collection.TraversableOnce$class.toSet(TraversableOnce.scala:436)
> at
> scala.collection.JavaConversions$JListWrapper.toSet(JavaConversions.scala:521)
> at
> kafka.controller.PartitionStateMachine$DeleteTopicsListener$$anonfun$handleChildChange$2.apply$mcV$sp(PartitionStateMachine.scala:448)
> at
> kafka.controller.PartitionStateMachine$DeleteTopicsListener$$anonfun$handleChildChange$2.apply(PartitionStateMachine.scala:445)
> at
> kafka.controller.PartitionStateMachine$DeleteTopicsListener$$anonfun$handleChildChange$2.apply(PartitionStateMachine.scala:445)
> at kafka.utils.Utils$.inLock(Utils.scala:538)
> at
> kafka.controller.PartitionStateMachine$DeleteTopicsListener.handleChildChange(PartitionStateMachine.scala:445)
> at org.I0Itec.zkclient.ZkClient$7.run(ZkClient.java:570)
> at org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:71)
> 2. IllegalStateException due to "Kafka scheduler has not been started".
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