[KAFKA-4761] NullPointerException if batch.size=0 for producer config

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.10.2.0
• Fix Version/s: 0.10.2.0
• Component/s: clients
• Environment: jdk1.8.0_40
• Assignee: Jason Gustafson
• Reporter: Swen Fuhrmann
• Created: 13/Feb/17 17:30
• Updated: 13/Feb/17 22:25
• Resolved: 13/Feb/17 22:25

Description

When setting batch.size to 0 for producer I get the following exception when sending a record:

java.lang.NullPointerException
	at org.apache.kafka.common.utils.Utils.notNull(Utils.java:315)
	at org.apache.kafka.clients.producer.internals.RecordAccumulator.append(RecordAccumulator.java:197)
	at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:478)
	at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:440)
	at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:360)
	at KafkaProducerTest.exposeNpeOnBatchSizeZero(KafkaProducerTest.java:21)

But documentation says:

... (a batch size of zero will disable batching entirely).

Please, see attached test.

Issue Links

• links to: GitHub Pull Request #2545