Peter Turcsanyi created NIFI-14644:
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Summary: Kafka3ProducerService should clean up resources if
producer creation fails
Key: NIFI-14644
URL: https://issues.apache.org/jira/browse/NIFI-14644
Project: Apache NiFi
Issue Type: Bug
Reporter: Peter Turcsanyi
Assignee: Peter Turcsanyi
Kafka3ProducerService performs some [initialization
steps|https://github.com/apache/nifi/blob/8f2657bdb00bc5664f328b82c01a96b7d18f44e1/nifi-extension-bundles/nifi-kafka-bundle/nifi-kafka-service-shared/src/main/java/org/apache/nifi/kafka/service/producer/Kafka3ProducerService.java#L52-L64]
on KafkaProducer. If it fails (e.g. due to authentication error), the producer
is not used anymore but there remains a background thread that cannot be
stopped (until NiFi is restarted) and continuously logs:
{noformat}
2025-06-09 15:01:39,548 INFO [kafka-producer-network-thread |
producer-e8c21853-c5ad-454b-8464-c3c8c51bf498]
o.apache.kafka.common.network.Selector [Producer
clientId=producer-e8c21853-c5ad-454b-8464-c3c8c51bf498,
transactionalId=e8c21853-c5ad-454b-8464-c3c8c51bf498] Failed authentication
with localhost/127.0.0.1 (channelId=-1) (Authentication failed during
authentication due to invalid credentials with SASL mechanism SCRAM-SHA-256)
2025-06-09 15:01:39,550 INFO [kafka-producer-network-thread |
producer-e8c21853-c5ad-454b-8464-c3c8c51bf498]
org.apache.kafka.clients.NetworkClient [Producer
clientId=producer-e8c21853-c5ad-454b-8464-c3c8c51bf498,
transactionalId=e8c21853-c5ad-454b-8464-c3c8c51bf498] Node -1 disconnected.
2025-06-09 15:01:39,550 ERROR [kafka-producer-network-thread |
producer-e8c21853-c5ad-454b-8464-c3c8c51bf498]
org.apache.kafka.clients.NetworkClient [Producer
clientId=producer-e8c21853-c5ad-454b-8464-c3c8c51bf498,
transactionalId=e8c21853-c5ad-454b-8464-c3c8c51bf498] Connection to node -1
(localhost/127.0.0.1:9093) failed authentication due to: Authentication failed
during authentication due to invalid credentials with SASL mechanism
SCRAM-SHA-256
2025-06-09 15:01:39,551 WARN [kafka-producer-network-thread |
producer-e8c21853-c5ad-454b-8464-c3c8c51bf498]
org.apache.kafka.clients.NetworkClient [Producer
clientId=producer-e8c21853-c5ad-454b-8464-c3c8c51bf498,
transactionalId=e8c21853-c5ad-454b-8464-c3c8c51bf498] Bootstrap broker
localhost:9093 (id: -1 rack: null isFenced: false) disconnected{noformat}
The failed producer object is not returned to Kafka3ConnectionService and
PublishKafka so these components cannot handle it. Kafka3ProducerService should
do the clean-up after producer initialization failure by calling
Producer.close().
To replicate the issue: configure SCRAM authentication and provide a wrong
password.
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