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

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Assignee: Unassigned
• Reporter: Alexander Pakulov
• Created: 15/Oct/15 00:00
• Updated: 22/Sep/16 00:42
• Resolved: 07/May/16 08:10

Description

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.

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);
}

Issue Links

• is duplicated by: KAFKA-3112 One incorrect bootstrap server will prevent Kafka producer from opening
• relates to: KAFKA-3112 One incorrect bootstrap server will prevent Kafka producer from opening
• links to: GitHub Pull Request #336