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https://issues.apache.org/jira/browse/KAFKA-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14329904#comment-14329904
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Gwen Shapira commented on KAFKA-1615:
-------------------------------------
Thanks for helping out on this!
Left few comments in the RB on things that puzzled me.
> 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
> Attachments: KAFKA-1615.patch
>
>
> 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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