[KAFKA-3539] KafkaProducer.send() may block even though it returns the Future

• Type: Bug
• Status: In Progress
• Priority: Critical
• Resolution: Unresolved
• Component/s: producer
• Labels: needs-discussion needs-kip
• Assignee: Unassigned
• Reporter: Oleg Zhurakousky
• Created: 11/Apr/16 19:54
• Updated: 18/Oct/21 05:54

Description

You can get more details from the [e-mail] by searching on the thread with the subject "KafkaProducer block on send".
The bottom line is that method that returns Future must never block, since it essentially violates the Future contract as it was specifically designed to return immediately passing control back to the user to check for completion, cancel etc.

Issue Links

• causes: LOG4J2-3173 KafkaAppender for log4j2 prevents an app from terminating
• relates to: KAFKA-3450 Producer blocks on send to topic that doesn't exist if auto create is disabled
• relates to: KAFKA-8178 KafkaProducer#send(ProducerRecord,Callback) may block for up to 60 seconds
• relates to: KAFKA-6705 producer.send() should not block due to metadata not available
• links to: GitHub Pull Request #3478