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From "Sriharsha Chintalapani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-1724) Errors after reboot in single node setup
Date Tue, 04 Nov 2014 17:40:35 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14196423#comment-14196423
] 

Sriharsha Chintalapani commented on KAFKA-1724:
-----------------------------------------------

[~otis] I started working on this. Will send a patch soon.

> Errors after reboot in single node setup
> ----------------------------------------
>
>                 Key: KAFKA-1724
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1724
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8.2
>            Reporter: Ciprian Hacman
>            Assignee: Sriharsha Chintalapani
>              Labels: newbie
>             Fix For: 0.8.2
>
>
> In a single node setup, after reboot, Kafka logs show the following:
> {code}
> [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)
> {code}
> The last log line repeats forever and is correlated with errors on the app side.
> Restarting Kafka fixes the errors.
> Steps to reproduce (with help from the mailing list):
> # start zookeeper
> # start kafka-broker
> # create topic or start a producer writing to a topic
> # stop zookeeper
> # stop kafka-broker( kafka broker shutdown goes into  WARN Session
> 0x14938d9dc010001 for server null, unexpected error, closing socket connection and attempting
reconnect (org.apache.zookeeper.ClientCnxn) java.net.ConnectException: Connection refused)
> # kill -9 kafka-broker
> # restart zookeeper and than kafka-broker leads into the the error above



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