kafka AdminClient API Timed out waiting for node assignment

问题

I'm new to Kafka and am trying to use the AdminClient API to manage the Kafka server running on my local machine. I have it setup exactly the same as in the quick start section of the Kafka documentation. The only difference being that I have not created any topics.

I have no issues running any of the shell scripts on this setup but when I try to run the following java code:

public class ProducerMain{

    public static void main(String[] args) {
        Properties props = new Properties();
        props.setProperty(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, 
            "localhost:9092");


        try(final AdminClient adminClient = 
              KafkaAdminClient.create(props)){

            try {
                final NewTopic newTopic = new NewTopic("test", 1, 
                    (short)1);

                final CreateTopicsResult createTopicsResult = 
                    adminClient.createTopics( 
                         Collections.singleton(newTopic));

                createTopicsResult.all().get();

            }catch (InterruptedException | ExecutionException e) {
                e.printStackTrace();
            }
        }
    }
}

Error: TimeoutException: Timed out waiting for a node assignment

Exception in thread "main" java.lang.RuntimeException: org.apache.kafka.common.errors.TimeoutException: Timed out waiting for a node assignment.
at ProducerMain.main(ProducerMain.java:41)
    <br>Caused by: java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Timed out waiting for a node assignment.
at org.apache.kafka.common.internals.KafkaFutureImpl.wrapAndThrow(KafkaFutureImpl.java:45)
at org.apache.kafka.common.internals.KafkaFutureImpl.access$000(KafkaFutureImpl.java:32)
at org.apache.kafka.common.internals.KafkaFutureImpl$SingleWaiter.await(KafkaFutureImpl.java:89)
at org.apache.kafka.common.internals.KafkaFutureImpl.get(KafkaFutureImpl.java:258)
at ProducerMain.main(ProducerMain.java:38)
<br>Caused by: org.apache.kafka.common.errors.TimeoutException: Timed out waiting for a node assignment.

I have searched online for an indication as to what the problem could be but have found nothing so far. Any suggestions are welcome as I am at the end of my rope.

来源：https://stackoverflow.com/questions/51325076/kafka-adminclient-api-timed-out-waiting-for-node-assignment

标签

java

apache-kafka

runtimeexception