Even if they are wrong, were you pointing to a zookeeper cluster where
another Kafka cluster was started up ?

Thanks
Neha


On Thu, May 23, 2013 at 7:53 AM, Yu, Libo <libo...@citi.com> wrote:

> I will answer my own question. It turns out the zookeeper addresses in
> server.properties are
> wrong.  But it is not easy to tell from the error message.
>
> Regards,
>
> Libo
>
> From: Yu, Libo [ICG-IT]
> Sent: Thursday, May 23, 2013 10:48 AM
> To: 'users@kafka.apache.org'
> Subject: Failed to launch 0.8 stable server
>
> Hi,
>
> After the zookeepers were up, when I tired to launch kafka server, I got
> this error:
> [2013-05-23 10:45:24,072] FATAL Fatal error during KafkaServerStable
> startup. Prepare to shutdown (kafka.server.KafkaServerStartable)
> java.lang.RuntimeException: A broker is already registered on the path
> /brokers/ids/1. 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$.registerBrokerInZk(ZkUtils.scala:194)
>         at
> kafka.server.KafkaZooKeeper.kafka$server$KafkaZooKeeper$$registerBrokerInZk(KafkaZooKeeper.scala:51)
>         at kafka.server.KafkaZooKeeper.startup(KafkaZooKeeper.scala:41)
>         at kafka.server.KafkaServer.startup(KafkaServer.scala:78)
>         at
> kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:34)
>         at kafka.Kafka$.main(Kafka.scala:46)
>         at kafka.Kafka.main(Kafka.scala)
> [2013-05-23 10:45:24,074] INFO [Kafka Server 1], shutting down
> (kafka.server.KafkaServer)
> [2013-05-23 10:45:24,076] INFO Closing zookeeper client...
> (kafka.server.KafkaZooKeeper)
> [2013-05-23 10:45:24,077] INFO Terminate ZkClient event thread.
> (org.I0Itec.zkcl
>
> Everything is freshly installed. It is so frustrating.
>
> Regards,
>
> Libo
>
>

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