Hi, How does a kafka of one have issues becoming a leader? I am using kafka 8.0. Should I just ignore this error? How would I resolve? I just have one kafka server in dev.
Below is how I start kafka: /var/lib/kafka-0.8.0-src/bin/kafka-server-start.sh /var/lib/kafka-0.8.0-src/config/server.properties [2014-02-06 02:51:59,936] INFO Will not load MX4J, mx4j-tools.jar is not in the classpath (kafka.utils.Mx4jLoader$) [2014-02-06 02:51:59,964] INFO 1391209402 successfully elected as leader (kafka.server.ZookeeperLeaderElector) [2014-02-06 02:52:00,311] ERROR Error while electing or becoming leader on broker 1391209402 (kafka.server.ZookeeperLeaderElector) kafka.common.KafkaException: Can't parse json string: null at kafka.utils.Json$.liftedTree1$1(Json.scala:36) at kafka.utils.Json$.parseFull(Json.scala:32) at kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$1.apply(ZkUtils.scala:529) at kafka.utils.ZkUtils$$anonfun$getReplicaAssignmentForTopics$1.apply(ZkUtils.scala:525) at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61) at scala.collection.immutable.List.foreach(List.scala:45) at kafka.utils.ZkUtils$.getReplicaAssignmentForTopics(ZkUtils.scala:525) at kafka.controller.KafkaController.initializeControllerContext(KafkaController.scala:535) at kafka.controller.KafkaController.onControllerFailover(KafkaController.scala:240) at kafka.controller.KafkaController$$anonfun$1.apply$mcV$sp(KafkaController.scala:111) at kafka.server.ZookeeperLeaderElector.elect(ZookeeperLeaderElector.scala:62) at kafka.server.ZookeeperLeaderElector.startup(ZookeeperLeaderElector.scala:46) at kafka.controller.KafkaController.startup(KafkaController.scala:470) at kafka.server.KafkaServer.startup(KafkaServer.scala:96) at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:34) at kafka.Kafka$.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$1(Json.scala:33) ... 16 more [2014-02-06 02:52:00,353] INFO [Kafka Server 1391209402], Started (kafka.server.KafkaServer) [2014-02-06 02:52:00,379] INFO New leader is 1391209402 (kafka.server.ZookeeperLeaderElector$LeaderChangeListener) Thanks