[jira] [Created] (KAFKA-8623) KafkaProducer possible deadlock when sending to different topics

["Alexander Bagiev (JIRA)" <ji...@apache.org>]

Alexander Bagiev created KAFKA-8623:
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             Summary: KafkaProducer possible deadlock when sending to different topics
                 Key: KAFKA-8623
                 URL: https://issues.apache.org/jira/browse/KAFKA-8623
             Project: Kafka
          Issue Type: Bug
          Components: producer 
    Affects Versions: 2.2.1
            Reporter: Alexander Bagiev


Project with bug reproduction: [https://github.com/abagiev/kafka-producer-bug]

It was found that sending two messages in two different topics in a row results in hanging of KafkaProducer for 60s and the following exception:
{noformat}
org.springframework.kafka.core.KafkaProducerException: Failed to send; nested exception is org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 60000 ms.
	at org.springframework.kafka.core.KafkaTemplate.lambda$buildCallback$0(KafkaTemplate.java:405) ~[spring-kafka-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:877) ~[kafka-clients-2.0.1.jar:na]
	at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:803) ~[kafka-clients-2.0.1.jar:na]
	at org.springframework.kafka.core.DefaultKafkaProducerFactory$CloseSafeProducer.send(DefaultKafkaProducerFactory.java:444) ~[spring-kafka-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.kafka.core.KafkaTemplate.doSend(KafkaTemplate.java:381) ~[spring-kafka-2.2.7.RELEASE.jar:2.2.7.RELEASE]
	at org.springframework.kafka.core.KafkaTemplate.send(KafkaTemplate.java:193) ~[spring-kafka-2.2.7.RELEASE.jar:2.2.7.RELEASE]
...
{noformat}
It looks like KafkaProducer requests two times for meta information for each topic and hangs just before second request due to some deadlock. When 60s pass TimeoutException is thrown and meta information is requested/received immediately (but after exception has been already thrown).

The issue in the example project is reproduced every time; and the use case is trivial.
 This is a critical bug for us.



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