Avi Youkhananov created KAFKA-12841: ---------------------------------------
Summary: NPE from the provided metadata in client callback in case of ApiException Key: KAFKA-12841 URL: https://issues.apache.org/jira/browse/KAFKA-12841 Project: Kafka Issue Type: Bug Components: clients Affects Versions: 2.6.0 Environment: Prod Reporter: Avi Youkhananov Attachments: NPE.production 1. org.apache.kafka.clients.producer.Callback interface has method onCompletion(...) Which says as part of the documentation : *The metadata for the record that was sent (i.e. the partition and offset). *An empty metadata with -1 value for all fields* except for topicPartition will be returned if an error occurred. We got an NPE from doSend(...) method in org.apache.kafka.clients.producer.KafkaProducer Which can occur in case ApiException was thrown ... In case of ApiException it uses the regular callback instead of InterceptorCallback which also may cover the NPE. 2. More over RecordMetadata has method partition() which return int but can also throw NPE because TopicPartition might be null. Stack trace attached. -- This message was sent by Atlassian Jira (v8.3.4#803005)