Kafka
  1. Kafka
  2. KAFKA-686

0.8 Kafka broker should give a better error message when running against 0.7 zookeeper

    Details

    • Type: Bug Bug
    • Status: Patch Available
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: 0.8.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:

      Description

      People will not know that the zookeeper paths are not compatible. When you try to start the 0.8 broker pointed at a 0.7 zookeeper you get a NullPointerException. We should detect this and give a more sane error.

      Error:
      kafka.common.KafkaException: Can't parse json string: null
      at kafka.utils.Json$.liftedTree1$1(Json.scala:20)
      at kafka.utils.Json$.parseFull(Json.scala:16)
      at kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$2.apply(ZkUtils.scala:498)
      at kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$2.apply(ZkUtils.scala:494)
      at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61)
      at scala.collection.immutable.List.foreach(List.scala:45)
      at kafka.utils.ZkUtils$.getReplicaAssignmentForTopics(ZkUtils.scala:494)
      at kafka.controller.KafkaController.initializeControllerContext(KafkaController.scala:446)
      at kafka.controller.KafkaController.onControllerFailover(KafkaController.scala:220)
      at kafka.controller.KafkaController$$anonfun$1.apply$mcV$sp(KafkaController.scala:85)
      at kafka.server.ZookeeperLeaderElector.elect(ZookeeperLeaderElector.scala:53)
      at kafka.server.ZookeeperLeaderElector.startup(ZookeeperLeaderElector.scala:43)
      at kafka.controller.KafkaController.startup(KafkaController.scala:381)
      at kafka.server.KafkaServer.startup(KafkaServer.scala:90)
      at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:34)
      at kafka.Kafka$.main(Kafka.scala:46)
      at kafka.Kafka.main(Kafka.scala)
      Caused by: java.lang.NullPointerException
      at scala.util.parsing.combinator.lexical.Scanners$Scanner.<init>(Scanners.scala:52)
      at scala.util.parsing.json.JSON$.parseRaw(JSON.scala:71)
      at scala.util.parsing.json.JSON$.parseFull(JSON.scala:85)
      at kafka.utils.Json$.liftedTree1$1(Json.scala:17)
      ... 16 more

      1. KAFAK-686-null-pointer-fix.patch
        0.8 kB
        Phil Hargett
      2. KAFKA-686-null-pointer-fix-2.patch
        3 kB
        Viktor Taranenko

        Activity

        No work has yet been logged on this issue.

          People

          • Assignee:
            Unassigned
            Reporter:
            Jay Kreps
          • Votes:
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            Watchers:
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            Dates

            • Created:
              Updated:

              Development