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Posted to jira@kafka.apache.org by "Joel Koshy (JIRA)" <ji...@apache.org> on 2018/07/17 23:40:00 UTC
[jira] [Resolved] (KAFKA-5098) KafkaProducer.send() blocks and
generates TimeoutException if topic name has illegal char
[ 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.
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