Jun Rao created KAFKA-1271:
------------------------------
Summary: controller logs exceptions during ZK session expiration
Key: KAFKA-1271
URL: https://issues.apache.org/jira/browse/KAFKA-1271
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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