Error starting kafka broker

Question

I was able to successfully create a zookeeper and one kafka broker yesterday. Everything worked as expected. I closed kafka (ctrl + c) and then zookeeper.

Today I started zookeeper, and when I started kafka ( bin/kafka-server-start.sh config/server0.properties), I got the following error. I tried various security features (completely uninstalling my kafka installation and doing it again from scratch). However, I get the same error.

[2016-09-28 16:15:55,895] FATAL Fatal error during KafkaServerStartable startup. Prepare to shutdown (kafka.server.KafkaServerStartable)
java.lang.RuntimeException: A broker is already registered on the path /brokers/ids/0. This probably indicates that you either have configured a brokerid that is already in use, or else you have shutdown this broker and restarted it faster than the zookeeper timeout so it appears to be re-registering.
        at kafka.utils.ZkUtils.registerBrokerInZk(ZkUtils.scala:305)
        at kafka.utils.ZkUtils.registerBrokerInZk(ZkUtils.scala:291)
        at kafka.server.KafkaHealthcheck.register(KafkaHealthcheck.scala:70)
        at kafka.server.KafkaHealthcheck.startup(KafkaHealthcheck.scala:51)
        at kafka.server.KafkaServer.startup(KafkaServer.scala:244)
        at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:37)
        at kafka.Kafka$.main(Kafka.scala:67)
        at kafka.Kafka.main(Kafka.scala)
[2016-09-28 16:15:55,896] INFO [Kafka Server 0], shutting down (kafka.server.KafkaServer)

Everything is set up in mac

Answer 1

kafka zookeeper. : , So, kafka, zookeeper . node, , . -, . kafka , zookeeper

, kafka , zookeeper . zookeeper kafka.

Answer 2

,

• [] / zookeeper/ids/[]. zk-cli . .
• - - kafka server . , .

Answer 3

AWS. , zookeeper . , . $ ps aux | grep zookeeper $kill -9 <zookeeper.properties process>

Answer 4

# the directory where the snapshot is stored.
dataDir=/tmp/zookeeper

config/zookeeper.properties.

, zk kafka zookeeper:

rm -rf /tmp/zookeeper

: D

Answer 5

, kafka , , prot 9092 . 9092 kafka.

, , kafka ( 0) . broker.id 1 0 "server0.properties" (, server0, - ? server.properties),

Answer 6

zookeeper-server-stop.[sh|bat] script.