[jira] [Created] (KAFKA-1271) controller logs exceptions during ZK session expiration

["Jun Rao (JIRA)" <ji...@apache.org>]

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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