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From "Manikumar Reddy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-3102) Kafka server unable to connect to zookeeper
Date Fri, 15 Jul 2016 09:50:20 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-3102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15379135#comment-15379135
] 

Manikumar Reddy commented on KAFKA-3102:
----------------------------------------

[~liuxinjian] There is no kafka issue. This looks like config error from the issue reporter.
If you have any specific issue/error, post it on kafka user mailing list.


> Kafka server unable to connect to zookeeper
> -------------------------------------------
>
>                 Key: KAFKA-3102
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3102
>             Project: Kafka
>          Issue Type: Bug
>          Components: security
>         Environment: RHEL 6
>            Reporter: Mohit Anchlia
>
> Server disconnects from the zookeeper with the following log, and logs are not indicative
of any problem. It works without the security setup however. 
> I followed the security configuration steps from this site: http://docs.confluent.io/2.0.0/kafka/sasl.html
> In here find the list of principals, logs and Jaas file:
> 1) Jaas file 
> KafkaServer {
>     com.sun.security.auth.module.Krb5LoginModule required
>     useKeyTab=true
>     storeKey=true
>     keyTab="/mnt/kafka/kafka/kafka.keytab"
>     principal="kafka/10.24.251.175@EXAMPLE.COM";
> };
> Client {
>     com.sun.security.auth.module.Krb5LoginModule required
>     useKeyTab=true
>     storeKey=true
>     keyTab="/mnt/kafka/kafka/kafka.keytab"
>     principal="kafka/10.24.251.175@EXAMPLE.COM";
> };
> 2) Principles from krb admin
> kadmin.local:  list_principals
> K/M@EXAMPLE.COM
> kadmin/admin@EXAMPLE.COM
> kadmin/changepw@EXAMPLE.COM
> kadmin/ip-10-24-251-175.us-west-2.compute.internal@EXAMPLE.COM
> kafka/10.24.251.175@EXAMPLE.COM
> krbtgt/EXAMPLE.COM@EXAMPLE.COM
> [2016-01-13 16:26:00,551] INFO starting (kafka.server.KafkaServer)
> [2016-01-13 16:26:00,557] INFO Connecting to zookeeper on localhost:2181 (kafka.server.KafkaServer)
> [2016-01-13 16:27:30,718] FATAL Fatal error during KafkaServer startup. Prepare to shutdown
(kafka.server.KafkaServer)
> org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server
within timeout: 6000
>         at org.I0Itec.zkclient.ZkClient.connect(ZkClient.java:1223)
>         at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:155)
>         at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:129)
>         at kafka.utils.ZkUtils$.createZkClientAndConnection(ZkUtils.scala:89)
>         at kafka.utils.ZkUtils$.apply(ZkUtils.scala:71)
>         at kafka.server.KafkaServer.initZk(KafkaServer.scala:278)
>         at kafka.server.KafkaServer.startup(KafkaServer.scala:168)
>         at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:37)
>         at kafka.Kafka$.main(Kafka.scala:67)
>         at kafka.Kafka.main(Kafka.scala)
> [2016-01-13 16:27:30,721] INFO shutting down (kafka.server.KafkaServer)
> [2016-01-13 16:27:30,727] INFO shut down completed (kafka.server.KafkaServer)
> [2016-01-13 16:27:30,728] FATAL Fatal error during KafkaServerStartable startup. Prepare
to shutdown (kafka.server.KafkaServerStartable)
> org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server
within timeout: 6000
>         at org.I0Itec.zkclient.ZkClient.connect(ZkClient.java:1223)
>         at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:155)
>         at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:129)
>         at kafka.utils.ZkUtils$.createZkClientAndConnection(ZkUtils.scala:89)
>         at kafka.utils.ZkUtils$.apply(ZkUtils.scala:71)
>         at kafka.server.KafkaServer.initZk(KafkaServer.scala:278)
>         at kafka.server.KafkaServer.startup(KafkaServer.scala:168)
>         at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:37)
>         at kafka.Kafka$.main(Kafka.scala:67)
>         at kafka.Kafka.main(Kafka.scala)
> [2016-01-13 16:27:30,729] INFO shutting down (kafka.server.KafkaServer)
> "server.log" 156L, 6404C                                                           



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