[ https://issues.apache.org/jira/browse/KAFKA-5098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joel Koshy resolved KAFKA-5098. ------------------------------- Resolution: Fixed > KafkaProducer.send() blocks and generates TimeoutException if topic name has > illegal char > ----------------------------------------------------------------------------------------- > > Key: KAFKA-5098 > URL: https://issues.apache.org/jira/browse/KAFKA-5098 > Project: Kafka > Issue Type: Bug > Components: producer > Affects Versions: 0.10.2.0 > Environment: Java client running against server using > wurstmeister/kafka Docker image. > Reporter: Jeff Larsen > Assignee: Ahmed Al-Mehdi > Priority: Major > Fix For: 2.1.0 > > > The server is running with auto create enabled. If we try to publish to a > topic with a forward slash in the name, the call blocks and we get a > TimeoutException in the Callback. I would expect it to return immediately > with an InvalidTopicException. > There are other blocking issues that have been reported which may be related > to some degree, but this particular cause seems unrelated. > Sample code: > {code} > import org.apache.kafka.clients.producer.*; > import java.util.*; > public class KafkaProducerUnexpectedBlockingAndTimeoutException { > public static void main(String[] args) { > Properties props = new Properties(); > props.put("bootstrap.servers", "kafka.example.com:9092"); > props.put("key.serializer", > "org.apache.kafka.common.serialization.StringSerializer"); > props.put("value.serializer", > "org.apache.kafka.common.serialization.StringSerializer"); > props.put("max.block.ms", 10000); // 10 seconds should illustrate our > point > String separator = "/"; > //String separator = "_"; > try (Producer<String, String> producer = new KafkaProducer<>(props)) { > System.out.println("Calling KafkaProducer.send() at " + new Date()); > producer.send( > new ProducerRecord<String, String>("abc" + separator + > "someStreamName", > "Not expecting a TimeoutException here"), > new Callback() { > @Override > public void onCompletion(RecordMetadata metadata, Exception e) { > if (e != null) { > System.out.println(e.toString()); > } > } > }); > System.out.println("KafkaProducer.send() completed at " + new Date()); > } > } > } > {code} > Switching to the underscore separator in the above example works as expected. > Mea culpa: We neglected to research allowed chars in a topic name, but the > TimeoutException we encountered did not help point us in the right direction. -- This message was sent by Atlassian JIRA (v7.6.3#76005)