Can you provide steps to reproduce this? I'm not sure I understand how you
run into this. It does look like a bug.
On Wed, Oct 22, 2014 at 9:55 AM, Ciprian Hacman <ciprian.hac...@sematext.com
> wrote:
> Hi,
>
> First of all, I am new to Kafka and more of a user than a developer. I will
> try to clarify things as much as possible though.
>
> We are using Kafka as a message system for our apps and works nicely in our
> SaaS cluster.
> I am trying to make the apps also work on a single node for demo purposes.
> I set up Zookeeper, Kafka and our apps on a node and things were ok until
> rebooting the node. After that I see the following messages in Kafka log:
>
> [2014-10-22 16:37:22,206] INFO [Controller 0]: Controller starting up
> (kafka.controller.KafkaController)
> [2014-10-22 16:37:22,419] INFO [Controller 0]: Controller startup complete
> (kafka.controller.KafkaController)
> [2014-10-22 16:37:22,554] INFO conflict in /brokers/ids/0 data:
>
> {"jmx_port":-1,"timestamp":"1413995842465","host":"ip-10-91-142-54.eu-west-1.compute.internal","version":1,"port":9092}
> stored data:
>
> {"jmx_port":-1,"timestamp":"1413994171579","host":"ip-10-91-142-54.eu-west-1.compute.internal","version":1,"port":9092}
> (kafka.utils.ZkUtils$)
> [2014-10-22 16:37:22,736] INFO I wrote this conflicted ephemeral node
>
> [{"jmx_port":-1,"timestamp":"1413995842465","host":"ip-10-91-142-54.eu-west-1.compute.internal","version":1,"port":9092}]
> at /brokers/ids/0 a while back in a different session, hence I will backoff
> for this node to be deleted by Zookeeper and retry (kafka.utils.ZkUtils$)
> [2014-10-22 16:37:25,010] ERROR Error handling event ZkEvent[Data of
> /controller changed sent to
> kafka.server.ZookeeperLeaderElector$LeaderChangeListener@a6af882]
> (org.I0Itec.zkclient.ZkEventThread)
> java.lang.IllegalStateException: Kafka scheduler has not been started
> at
> kafka.utils.KafkaScheduler.ensureStarted(KafkaScheduler.scala:114)
> at kafka.utils.KafkaScheduler.shutdown(KafkaScheduler.scala:86)
> at
>
> kafka.controller.KafkaController.onControllerResignation(KafkaController.scala:350)
> at
>
> kafka.controller.KafkaController$$anonfun$2.apply$mcV$sp(KafkaController.scala:162)
> at
>
> kafka.server.ZookeeperLeaderElector$LeaderChangeListener$$anonfun$handleDataDeleted$1.apply$mcZ$sp(ZookeeperLeaderElector.scala:138)
> at
>
> kafka.server.ZookeeperLeaderElector$LeaderChangeListener$$anonfun$handleDataDeleted$1.apply(ZookeeperLeaderElector.scala:134)
> at
>
> kafka.server.ZookeeperLeaderElector$LeaderChangeListener$$anonfun$handleDataDeleted$1.apply(ZookeeperLeaderElector.scala:134)
> at kafka.utils.Utils$.inLock(Utils.scala:535)
> at
>
> kafka.server.ZookeeperLeaderElector$LeaderChangeListener.handleDataDeleted(ZookeeperLeaderElector.scala:134)
> at org.I0Itec.zkclient.ZkClient$6.run(ZkClient.java:549)
> at org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:71)
> [2014-10-22 16:37:28,757] INFO Registered broker 0 at path /brokers/ids/0
> with address ip-10-91-142-54.eu-west-1.compute.internal:9092.
> (kafka.utils.ZkUtils$)
> [2014-10-22 16:37:28,849] INFO [Kafka Server 0], started
> (kafka.server.KafkaServer)
> [2014-10-22 16:38:56,718] INFO Closing socket connection to /127.0.0.1.
> (kafka.network.Processor)
> [2014-10-22 16:38:56,850] INFO Closing socket connection to /127.0.0.1.
> (kafka.network.Processor)
> [2014-10-22 16:38:56,985] INFO Closing socket connection to /127.0.0.1.
> (kafka.network.Processor)
>
>
> The last log line repeats forever and is correlated with errors on the app
> side.
> Restarting Kafka fixes the errors.
>
> I am using Kafka 0.8.2 from github to avoid
> https://issues.apache.org/jira/browse/KAFKA-1451.
>
> Does anyone have any idea why this happens and how it can be fixed?
>
> Thanks,
> Ciprian
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>
