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https://issues.apache.org/jira/browse/KAFKA-6061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16213889#comment-16213889
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Mickael Maison commented on KAFKA-6061:
---------------------------------------
DUP of https://issues.apache.org/jira/browse/KAFKA-5885
> "ERROR Error while electing or becoming leader on broker 13
> (kafka.server.ZookeeperLeaderElector) kafka.common.KafkaException: Can't
> parse json string: null" should print out information on which zookeeper path
> contains the null element
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-6061
> URL: https://issues.apache.org/jira/browse/KAFKA-6061
> Project: Kafka
> Issue Type: Bug
> Components: zkclient
> Affects Versions: 0.10.2.1
> Reporter: Koelli Mungee
> Labels: newbie
> Fix For: 1.1.0
>
>
> The controller enters a loop with the error as
> {code:java}
> [2017-10-12 21:40:09,532] ERROR Error while electing or becoming leader on
> broker 13 (kafka.server.ZookeeperLeaderElector)
> kafka.common.KafkaException: Can't parse json string: null
> at kafka.utils.Json$.liftedTree1$1(Json.scala:40)
> at kafka.utils.Json$.parseFull(Json.scala:36)
> at
> kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$1.apply(ZkUtils.scala:684)
>
> at
> kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$1.apply(ZkUtils.scala:680)
>
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
>
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
> at kafka.utils.ZkUtils.getReplicaAssignmentForTopics(ZkUtils.scala:680)
> at
> kafka.controller.KafkaController.initializeControllerContext(KafkaController.scala:736)
>
> at
> kafka.controller.KafkaController.onControllerFailover(KafkaController.scala:334)
>
> at
> kafka.controller.KafkaController$$anonfun$1.apply$mcV$sp(KafkaController.scala:167)
>
> at kafka.server.ZookeeperLeaderElector.elect(ZookeeperLeaderElector.scala:84)
> {code}
> A kafka-topics --describe can be issued to figure out which topic partition
> has the problem. However, this would be easier for the user if the actual zk
> path with the null or malformed entry would be printed out.
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