[jira] [Resolved] (KAFKA-2657) Kafka clients fail to start if one of broker isn't resolved by DNS

["Ismael Juma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-2657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ismael Juma resolved KAFKA-2657.
--------------------------------
    Resolution: Duplicate

This was fixed via KAFKA-3112.

> Kafka clients fail to start if one of broker isn't resolved by DNS 
> -------------------------------------------------------------------
>
>                 Key: KAFKA-2657
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2657
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Alexander Pakulov
>            Priority: Minor
>
> During org.apache.kafka.clients.producer.KafkaProducer and org.apache.kafka.clients.consumer.KafkaConsumer object creation constructors invoke org.apache.kafka.common.utils.ClientUtils#parseAndValidateAddresses
> which potentially could throw an exception if one the nodes hasn't been resolved by DNS. As a result of that - object hasn't been created and you aren't able to use Kafka clients.
> I personally think that Kafka should be able to operate with cluster with quorum number of instances.
> {code:java}
> try {
>     InetSocketAddress address = new InetSocketAddress(host, port);
>     if (address.isUnresolved())
>         throw new ConfigException("DNS resolution failed for url in " + ProducerConfig.BOOTSTRAP_SERVERS_CONFIG + ": " + url);
>     addresses.add(address);
> } catch (NumberFormatException e) {
>     throw new ConfigException("Invalid port in " + ProducerConfig.BOOTSTRAP_SERVERS_CONFIG + ": " + url);
> }
> {code}



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