error during KafkaServerStartable startup Prepare to shutdown kafka server KafkaServerStartable

Question

I tried to start kafka server, but I am getting this below error.

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)

How can I solve this error?

Thank You

Answer 1

Hi@akhtar,

This error occurs because zookeeper is running already. So kill the process first and then try again and it will work.

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

Hope this works for you!

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Thank You

Comments

what is 

zookeeper.properties process in zookeeper and where is it?