[jira] [Updated] (KAFKA-1615) Generating group ID in ZookeeperConsumerConnector shouldn't require local hostname to resolve

["Neha Narkhede (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Neha Narkhede updated KAFKA-1615:
---------------------------------
    Labels: newbie usability  (was: )

> Generating group ID in ZookeeperConsumerConnector shouldn't require local hostname to resolve
> ---------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-1615
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1615
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8.1.1
>            Reporter: Gwen Shapira
>            Assignee: Gwen Shapira
>            Priority: Minor
>              Labels: newbie, usability
>
> ZookeeperConsumerConnector generates group ID by taking the local hostname:
> consumerUuid = "%s-%d-%s".format(
>         InetAddress.getLocalHost.getHostName, System.currentTimeMillis,
>         uuid.getMostSignificantBits().toHexString.substring(0,8))
> If localhost doesn't resolve (something that happens occasionally), this will fail with following error:
> Exception in thread "main" java.net.UnknownHostException: Billc-cent70x64: Billc-cent70x64: Name or service not known
> 	at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
> 	at kafka.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:119)
> 	at kafka.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:142)
> 	at kafka.consumer.Consumer$.create(ConsumerConnector.scala:89)
> 	at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:149)
> 	at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
> Caused by: java.net.UnknownHostException: Billc-cent70x64: Name or service not known
> 	at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
> 	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
> 	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
> 	at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
> 	... 5 more
> Normally requiring a resolving localhost is not a problem, but here is seems a bit frivolous - its just for generating an ID, nothing network related.
> I think we can catch the exception and generate an ID without the hostname.
> This is low priority since the issue can be easily worked around (add the hostname to /etc/hosts) and since this API is going away anyway with the new consumer API.  



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